Argan Oil for Hair: Benefits, Uses, Risks and How to Apply It

Argan oil for hair is widely used to improve softness, shine, hydration, and manageability. It comes from the kernels of the argan tree, which is native to Morocco. The oil contains fatty acids, vitamin E compounds, and plant antioxidants.

When applied to the hair, argan oil can coat the shaft and reduce friction. As a result, it may help with dryness, frizz, tangling, and breakage. It may also provide comfort for some people with a mildly dry, non-inflamed scalp.

However, argan oil is not a proven cure for hair loss, alopecia, dandruff, scalp infection, or inflammatory scalp disease. Its main benefits are cosmetic and protective rather than medical.

This guide explains the main benefits of argan oil, who may benefit from it, how to use it safely, when to avoid it, and when a hair or scalp concern needs professional evaluation.

What Is Argan Oil?

Argan oil is a plant oil extracted from the kernels of the Moroccan argan tree. Cosmetic companies commonly include it in products for the hair, scalp, skin, and nails.

The oil contains fatty acids, including oleic acid and linoleic acid. It also contains vitamin E compounds and other antioxidants. Together, these substances can help coat the hair shaft and reduce moisture loss from its surface.

Argan oil does not add water to dry hair by itself. Instead, it works mainly as an emollient and surface conditioner. Therefore, it often works best after a water-based conditioner or leave-in product.

Cosmetic Argan Oil Versus Culinary Argan Oil

Cosmetic and culinary argan oils are produced for different purposes. For hair care, choose a product clearly labelled for cosmetic use.

Check the ingredient list as well. Some products marketed as argan oil contain only a small amount alongside silicones, fragrance, mineral oil, or other plant oils.

A blended serum is not necessarily a poor product. In fact, it may feel lighter and work better for fine hair. Still, the label should make the formula clear.

Pure Argan Oil

Pure cosmetic argan oil usually lists Argania Spinosa Kernel Oil as its only ingredient.

It should have a mild natural smell rather than a strong perfume. Store the bottle away from direct light and heat because plant oils can oxidise and become rancid.

How Argan Oil Works on the Hair Shaft

The visible hair strand consists mainly of keratin. Because this part of the hair is not living tissue, a cosmetic product cannot permanently heal severe structural damage.

However, oils and conditioners can improve the strand’s surface. They may smooth raised cuticles, reduce friction, improve slip, and limit moisture loss.

As a result, the hair may feel softer and become easier to detangle. It may also look shinier because a smoother surface reflects light more evenly.

Hair Protection Versus Hair Repair

The word repair can be misleading in hair-care advertising. Argan oil may improve the feel and appearance of damaged hair, but it cannot permanently rebuild a severely fractured strand.

Split ends cannot be permanently sealed either. An oil can temporarily smooth them, while trimming removes the damaged section.

For a more complete routine, read the hair-damage, breakage, and prevention guide.

Benefits of Argan Oil for Hair

Argan oil mainly works as a conditioning and protective hair-care ingredient. Its most realistic benefits involve softness, shine, frizz control, easier detangling, and reduced mechanical damage.

1. Conditions Dry or Damaged Hair

Argan oil can help dry or damaged hair feel softer. It coats the outer shaft and reduces friction between neighbouring strands.

This effect may be useful after bleaching, colouring, heat styling, chemical straightening, or repeated exposure to sun, wind, and dry air.

However, the oil cannot reverse deep structural damage. It offers temporary cosmetic support while healthier hair grows from the follicle.

2. May Reduce Friction and Breakage

Friction can damage the cuticle during washing, towel drying, brushing, sleeping, and styling. When the cuticle becomes rough, strands catch against each other and may snap more easily.

Argan oil adds lubrication. Therefore, it may help reduce hair breakage caused by tangling and rough handling.

The benefit is most likely when oil use is combined with gentle detangling, regular conditioning, reduced heat, and low-tension hairstyles.

3. Adds Temporary Shine

Argan oil can make hair appear shinier by smoothing the cuticle. A smoother surface reflects light more evenly than a rough or damaged one.

Dry, coarse, curly, chemically treated, and colour-treated hair may show the clearest effect. Fine hair can also gain shine, although it usually needs much less product.

4. Helps Smooth Frizz

Frizz often appears when the cuticle is raised or when hair reacts to changes in humidity. Damage, dryness, and friction can make it worse.

A small amount of argan oil may smooth the surface and reduce flyaways. It can also help curls and waves look more defined.

Still, oil alone may not provide enough moisture for very dry hair. A water-based leave-in conditioner followed by a small amount of oil may work better.

5. Makes Detangling Easier

Because argan oil improves slip, it may make knots easier to separate. Easier detangling can reduce pulling and snapping.

Apply the product to damp middle lengths and ends. Then work gently from the ends upward with your fingers or a wide-tooth comb.

6. May Help Protect Hair Before Washing

Shampoo removes oil, dirt, sweat, and product residue. However, strong cleansers or frequent washing may leave some hair types feeling dry.

A small amount of argan oil used before shampooing may reduce the drying effect on the lengths and ends. This method may be especially useful for porous, curly, bleached, or brittle hair.

7. May Offer Limited Protection From Oxidative Damage

Environmental exposure and chemical treatments can increase oxidative damage within the hair fibre.

Laboratory research suggests that argan oil used before oxidative treatment may reduce protein loss and some measures of hair-shaft damage.

However, this does not mean that argan oil makes bleaching or colouring harmless. Limiting overlapping chemical treatments and using appropriate professional techniques remain more important.

8. May Support Mildly Dry Scalp Skin

A small amount of argan oil may soften dry scalp skin and reduce a tight feeling. It may also support the surface skin barrier by adding lipids.

This potential benefit applies mainly to simple dryness. It does not mean that oil treats every itchy, flaky, or inflamed scalp condition.

For a broader routine, review the scalp-care guide.

Who Argan Oil May Help Most

Argan oil is most useful when the main problem involves the condition of the hair shaft rather than disease inside the follicle.

Dry or Brittle Hair

Dry and brittle hair may benefit from a small amount of oil on the middle lengths and ends.

It may reduce roughness and improve flexibility during detangling.

Bleached or Chemically Treated Hair

Bleaching, colouring, relaxing, and chemical straightening can weaken the cuticle and increase porosity.

Argan oil may improve softness and reduce further friction. However, it cannot reverse severe chemical damage.

Curly or Coily Hair

Curly and coily hair may be more vulnerable to dryness, tangling, and mechanical breakage.

Argan oil can help seal in moisture after a water-based leave-in conditioner. However, oil itself does not hydrate the hair with water.

Coarse or Frizz-Prone Hair

Coarse or frizz-prone hair may tolerate a richer oil application than fine hair.

The oil may smooth flyaways, improve shine, and make the surface feel less rough.

Hair Exposed to Regular Heat Styling

Argan oil may support conditioning after heat styling. However, use a dedicated heat-protection product before high-temperature tools.

Hair Extensions

A lightweight argan serum may reduce tangling and friction on the free lengths of extensions.

Keep oil away from tapes, glue, keratin bonds, rings, and attachment areas unless the installer confirms that it is compatible.

Dry Scalp, Dandruff, and Inflammation Are Different

A dry scalp may produce small, dry flakes and feel tight or itchy. Weather, strong cleansers, frequent washing, and irritating products may contribute.

By contrast, dandruff and seborrhoeic dermatitis often affect oily areas and may cause greasy flakes, redness, or ongoing itching. Psoriasis, eczema, infection, and allergic contact dermatitis can also resemble dryness.

Argan oil may help simple dryness. However, it may not control inflammatory or yeast-related scalp problems.

A medicated shampoo may be more appropriate when dandruff or seborrhoeic dermatitis is present. Review the shampoo guide for scalp health.

When Scalp Oil May Make Things Worse

Heavy scalp oiling may increase buildup or irritation in some people. It may also make greasy scaling harder to manage.

Use caution if you have:

• Oily or greasy flakes.
• Scalp acne or folliculitis.
• Pustules or crusting.
• Open sores.
• Severe itching or burning.
• Psoriasis or active dermatitis.
• A known fragrance or cosmetic allergy.

For ongoing symptoms, read more about an itchy scalp and its connection to hair loss.

Can Argan Oil Help Hair Growth?

Argan oil may help hair retain length by reducing dryness, tangling, and breakage. Therefore, hair may appear longer or fuller over time because fewer strands snap.

However, length retention is not the same as new follicular growth.

Current clinical evidence does not show that argan oil reliably:

• Creates new follicles.
• Regrows bald areas.
• Reverses androgenetic alopecia.
• Treats alopecia areata.
• Stops scarring alopecia.
• Corrects low iron, thyroid disease, or hormonal imbalance.
• Reactivates follicles destroyed by scar tissue.

If thinning is caused by follicle miniaturisation, autoimmune disease, nutritional deficiency, thyroid imbalance, stress-related shedding, or inflammation, the underlying cause also needs attention.

How to Use Argan Oil for Hair

You can use argan oil in several ways. The right method depends on your texture, scalp type, product formula, and level of dryness.

Start With a Patch Test

Before applying a new oil or serum widely, place a small amount behind the ear or on the inner arm.

Watch the area for redness, burning, itching, swelling, or a rash for 24 to 48 hours. A patch test cannot rule out every future reaction, but it may identify an obvious sensitivity.

DIY Argan Oil Hair Mask

An argan oil mask may help dry, coarse, curly, chemically treated, or damaged hair feel softer.

1. Place a small amount of argan oil in your palm.
2. Start with about half a teaspoon for short or fine hair.
3. Use slightly more for long, thick, or coarse hair when needed.
4. Apply the oil mainly to the middle lengths and ends.
5. Leave it on for 20 to 30 minutes.
6. Wash thoroughly with a gentle shampoo.
7. Repeat weekly or less often if buildup develops.

You may combine argan oil with coconut or jojoba oil. However, heavier blends can be difficult to remove and may not suit fine or oily hair.

Argan Oil Scalp Treatment

For simple scalp dryness, apply only a few drops and massage gently with the fingertips.

1. Patch test the product first.
2. Apply a few drops only to dry areas.
3. Massage gently for two to five minutes.
4. Leave it on for approximately 20 minutes during the first use.
5. Wash the scalp thoroughly.
6. Stop if itching, burning, redness, bumps, or greasy scaling becomes worse.

Do not apply oil to open wounds, infected skin, active folliculitis, or a severely inflamed scalp.

Leave-In Treatment

Argan oil can work as a lightweight leave-in product after washing.

1. Begin with one drop on damp hair.
2. Rub it between your palms.
3. Apply it to the middle lengths and ends.
4. Avoid the roots if your hair becomes oily easily.
5. Detangle gently with your fingers or a wide-tooth comb.

Fine hair may need less than one full drop. By contrast, thick, curly, or coarse hair may tolerate several drops.

Finishing Oil for Dry Hair

Use a very small amount on dry hair to smooth flyaways, reduce frizz, and add shine.

• Warm one drop between your palms.
• Lightly press your hands over the hair’s surface.
• Apply the remaining product to the ends.
• Avoid saturating the roots.

Pre-Shampoo Treatment

Apply a small amount to the lengths and ends 20 to 30 minutes before washing.

This method may reduce dryness associated with shampooing. It can be especially useful for curly, porous, bleached, or colour-treated hair.

Overnight Treatment

Some people leave argan oil on the hair overnight. This may suit very dry lengths, but longer contact is not always more effective.

Use a small amount and protect the pillowcase. Avoid overnight scalp application if your scalp is oily, acne-prone, sensitive, or prone to folliculitis.

Using Argan Oil Before Heat Styling

A small amount may reduce friction and help the hair feel smoother during blow-drying.

However, pure oil should not replace a tested heat-protection product. Use moderate temperatures and avoid repeated passes with hot tools.

Argan Oil for Different Hair Types

Dry or Damaged Hair

Dry, brittle, bleached, or chemically treated hair may gain the most noticeable cosmetic benefit.

Use argan oil as a pre-shampoo treatment, weekly mask, or small leave-in treatment on the ends.

Curly and Coily Hair

Argan oil may reduce frizz and improve the softness of curly hair.

Apply it over a water-based leave-in conditioner to help reduce moisture loss. Begin with a small amount so the curls do not become heavy or coated.

Fine Hair

Fine hair can become flat or greasy quickly. Therefore, use a very small amount and keep it away from the roots.

A lightweight argan serum may work better than pure oil. However, check the label for fragrance or other ingredients that may irritate sensitive skin.

Thick or Coarse Hair

Thick and coarse hair may tolerate more product. A pre-shampoo treatment or richer mask can improve softness and manageability.

Even so, buildup can still occur. Clarify gently when needed and reduce the amount if the hair starts to feel coated.

Low-Porosity Hair

Low-porosity hair may resist water and product absorption. Heavy oiling can sit on the surface and create buildup.

Use only a trace amount on damp hair. A lighter serum may suit this hair type better than repeated oil masks.

High-Porosity Hair

High-porosity hair often loses moisture quickly because the cuticle is raised or damaged.

Argan oil may help smooth the surface after a water-based moisturiser. However, damaged high-porosity hair may also need regular conditioning and reduced chemical or heat exposure.

Colour-Treated Hair

Argan oil can improve softness and shine in colour-treated hair. It may also reduce friction after chemical services.

However, it cannot prevent all colour fading or reverse severe chemical damage. Use a colour-safe shampoo and avoid overlapping bleach on previously lightened areas.

Oily or Acne-Prone Scalp

People with an oily or acne-prone scalp should use argan oil cautiously.

Applying oil directly to the scalp or hairline may contribute to buildup, clogged follicles, or breakouts in some people. Apply it only to the lengths and ends or choose a lightweight formula.

Sensitive Scalp

A sensitive scalp may react to fragrance, preservatives, essential oils, or botanical extracts within an argan product.

Choose a fragrance-free formula with a short ingredient list. Patch test first and stop using it if symptoms develop.

Best Types of Argan Oil Hair Products

Argan products come in several formats. The best choice depends on whether you want scalp comfort, frizz control, damage support, or curl definition.

Pure Argan Oil

Pure cosmetic argan oil may work well for dry ends, masks, and pre-shampoo treatments.

It can feel too heavy for fine or oily hair. Therefore, begin with one drop and increase only when needed.

Lightweight Argan Serum

Serums often combine a small amount of argan oil with lightweight silicones or other smoothing agents.

These formulas may provide faster shine and frizz control without the weight of pure oil. However, they can still create buildup with repeated use.

Argan Oil Conditioner

A rinse-out conditioner containing argan oil can provide softness with less risk of greasiness.

This format may suit fine, straight, oily, or low-porosity hair better than pure oil.

Argan Oil Hair Mask

A prepared mask may combine argan oil with conditioning agents, silicones, proteins, or plant extracts.

Protein-heavy masks do not suit every hair type. If the hair feels stiff after use, reduce the frequency or choose a moisturising formula without added protein.

Curl-Defining Cream

Curl creams containing argan oil may support definition, softness, and frizz control.

Choose a product based on curl type, porosity, desired hold, and how easily the hair develops buildup.

Dry Scalp Product

A fragrance-free scalp product containing argan oil may reduce surface dryness in some people.

However, persistent dandruff, greasy scale, sores, or inflammation should be assessed rather than repeatedly covered with oil.

Frizz-Fighting Oil Blend

An oil blend may combine argan oil with jojoba, coconut, castor, or sunflower oil. It may also contain silicone-based smoothing ingredients.

These products can improve slip and reduce frizz. Still, check the full ingredient list if you are sensitive to fragrance or prone to scalp buildup.

Serum for Hair Extensions

An argan-based serum may help extensions remain smooth and reduce friction.

Apply it only to the lengths and ends. Avoid attachment points because oils may weaken some tapes, glues, keratin bonds, or adhesives.

How Much Argan Oil Should You Use?

The ideal amount depends on hair length, density, texture, porosity, and product strength.

• Short or fine hair: Use less than one drop or a trace left on the palms.
• Medium-length hair: Begin with one or two drops.
• Long, thick, or curly hair: Begin with two or three drops and add more only where needed.
• Pre-shampoo mask: Use enough to lightly coat the lengths without soaking them.
• Scalp dryness: Apply only a few drops to limited dry areas.

Using too much will not improve the result. Instead, it may make hair greasy and require stronger shampooing to remove.

When to Avoid Argan Oil

Argan oil is not the right choice for every hair or scalp problem.

Avoid applying it directly to the scalp when you have:

• Open wounds, sores, or draining areas.
• Pustules or active folliculitis.
• Greasy yellow scale or severe seborrhoeic dermatitis.
• Suspected fungal or bacterial infection.
• Active psoriasis or severe dermatitis without medical guidance.
• Burning, pain, or rapidly worsening inflammation.
• Active inflammatory or scarring alopecia.
• A previous allergic reaction to argan oil or the product formula.

Apply oil only to the lengths and ends when the scalp is oily, acne-prone, or easily clogged.

Also avoid putting oil near extension bonds, tapes, or adhesives unless your extension provider confirms that the product is compatible.

Possible Side Effects and Precautions

Argan oil is generally well tolerated, but no cosmetic product is suitable for everyone.

• Allergic reaction: Stop using the product if redness, swelling, hives, burning, or severe itching develops.
• Contact dermatitis: Fragrance, preservatives, or other oils in the formula may trigger a rash.
• Acne or folliculitis: Oil applied to the scalp or hairline may contribute to bumps or clogged follicles.
• Product buildup: Heavy or repeated use may leave hair greasy, flat, or difficult to wash.
• Increased scaling: Applying oil to an already greasy or inflamed scalp may worsen the appearance of flakes.
• Eye irritation: Keep the oil away from the eyes and rinse thoroughly if contact occurs.
• Severe allergy concerns: People with a history of serious allergies should discuss use with a healthcare professional.

Do not assume that a product has no contraindications simply because it is natural. The full formula, skin condition, allergy history, medication, and scalp health all matter.

When to See a Trichologist or Dermatologist

Argan oil may improve cosmetic dryness and breakage. However, professional evaluation is recommended when the pattern suggests more than surface damage.

Arrange an assessment if you notice:

• Sudden or heavy shedding.
• Round or irregular bald patches.
• A widening part or receding hairline.
• Scalp pain, burning, sores, or pustules.
• Persistent dandruff or thick scaling.
• Smooth or shiny scalp areas with no visible follicular openings.
• Eyebrow or eyelash loss.
• Hair loss lasting several months.
• Hair loss with fatigue, weight changes, irregular periods, or other health symptoms.
• Severe breakage that continues despite gentler care.

When to See a Trichologist

A trichologist can examine the visible pattern, review styling and product use, assess breakage, and document changes in density.

They may also help distinguish hair-shaft damage from shedding or progressive thinning and recommend referral when medical signs are present.

When to See a Dermatologist

A dermatologist is needed when the scalp shows inflammation, infection, autoimmune loss, scarring, painful lesions, or rapidly progressing hair loss.

A dermatologist can provide medical diagnosis, biopsy, laboratory testing, prescription treatment, and medical monitoring.

Find a Trichologist Near You

If you are dealing with thinning hair, breakage, scalp dryness, dandruff, irritation, or ongoing shedding, professional support can help separate cosmetic hair damage from a medical hair-loss condition.

Start here: Find a Trichologist Near You.

You can also explore these local pages:

• Trichologist in Chicago, IL
• Trichologist in Illinois
• Trichologist in Georgia
• Trichologist in Florida
• Trichologist in Los Angeles, CA
• Trichologist in California
• Trichologist in New York, NY
• Trichologist in Brooklyn, NY
• Trichologist in North Carolina
• Trichologist in Texas

Frequently Asked Questions About Argan Oil for Hair

Benefits and Hair Growth

What does argan oil do for hair?

Argan oil conditions the hair shaft. It may improve softness, reduce frizz, add shine, make detangling easier, and limit friction-related breakage.

Can argan oil regrow hair?

There is not enough clinical evidence to show that argan oil directly stimulates new follicle growth. It may help hair retain length by reducing breakage, but it is not a proven treatment for baldness or alopecia.

Is argan oil good for thinning hair?

It may make existing strands look smoother and healthier. However, it does not treat follicle miniaturisation, hormonal hair loss, autoimmune alopecia, or other medical causes of thinning.

Does argan oil make hair thicker?

Argan oil can coat the strands and temporarily make them feel smoother or fuller. It does not permanently increase the natural diameter or number of follicles.

Does argan oil stop hair breakage?

It may reduce friction and make dry hair more flexible, which can reduce some mechanical breakage. Severe damage also requires gentler styling, conditioning, and trimming when needed.

Scalp and Dandruff

Can argan oil help dandruff?

It may help flaking caused by simple dryness. However, dandruff related to seborrhoeic dermatitis may need a medicated shampoo or another treatment.

Can I use argan oil on a sensitive scalp?

Possibly. Choose a fragrance-free formula, patch test first, and stop if burning, redness, itching, swelling, or bumps appear.

Can argan oil cause acne?

It may contribute to breakouts or folliculitis in some acne-prone users, especially when applied heavily to the scalp, forehead, or hairline.

Can argan oil make dandruff worse?

Heavy oiling may worsen buildup or greasy scaling in some people. Stop scalp use if flaking, redness, or itching increases.

Application and Frequency

How often should I use argan oil?

Use it according to your hair’s needs. Fine hair may need a trace amount once or twice weekly. Thick, curly, or very dry hair may tolerate more frequent use.

Should argan oil go on wet or dry hair?

You can apply it to either. Use it on damp hair for easier detangling and reduced moisture loss. Apply a tiny amount to dry hair for shine and frizz control.

Can I leave argan oil in my hair overnight?

Yes, when the hair and scalp tolerate it. Use a small amount and wash thoroughly the next day. Avoid overnight scalp use if you are oily, acne-prone, or prone to folliculitis.

How much argan oil should I use?

Start with one drop or less. Fine hair may need only a trace, while long, thick, or curly hair may tolerate several drops.

Can I use argan oil every day?

Some dry or coarse hair types may tolerate daily use on the ends. However, daily use can cause buildup or greasiness, especially on fine or low-porosity hair.

Damage, Heat, and Styling

Does argan oil protect hair from heat?

It may reduce friction and dryness, but it should not replace a product specifically tested for heat protection when using high-temperature tools.

Can argan oil repair split ends?

It can temporarily smooth split ends and reduce friction. However, only trimming can permanently remove the split section.

Is argan oil suitable for curly hair?

Yes. It may improve softness, definition, and frizz control. Apply a small amount over a water-based leave-in product to avoid weighing curls down.

Can I use argan oil on hair extensions?

Yes, on the lengths and ends. Avoid tapes, glue, keratin bonds, or other attachment points unless your extension provider confirms that oil is safe.

What is the difference between pure argan oil and argan serum?

Pure argan oil contains only argan kernel oil. An argan serum may also contain silicones, fragrance, preservatives, or other oils designed for styling and smoothing.

Safety and Professional Help

Can argan oil cause an allergic reaction?

Yes. Argan oil or other ingredients in the formula may cause contact dermatitis. Stop use if itching, burning, redness, swelling, hives, or a rash develops.

When should I stop using argan oil?

Stop when the product causes irritation, increased scaling, painful bumps, folliculitis, or worsening scalp symptoms.

When should I see a trichologist?

Arrange an assessment when breakage continues despite gentler care or when you notice ongoing shedding, progressive thinning, scalp irritation, or uncertainty about the cause.

When should I see a dermatologist?

See a dermatologist for painful inflammation, infection, bald patches, eyebrow loss, scar-like areas, rapidly progressing loss, or scalp symptoms that may require medical diagnosis and treatment.

References

1. Argan Oil as a Pretreatment of Human Hair Before Oxidative Damage
2. Coconut, Castor, and Argan Oil for Hair in Skin of Colour Patients
3. Hair Oils: Review of Properties, Uses, and Available Evidence
4. Hair Cosmetics: An Overview
5. Allergic Contact Dermatitis Caused by Argan Oil
6. American Academy of Dermatology: Dry Scalp and Related Conditions
7. American Academy of Dermatology: Seborrhoeic Dermatitis Treatment

Conclusion: Is Argan Oil Good for Hair?

Argan oil can be a useful part of a hair-care routine, especially for dry, frizzy, curly, colour-treated, or damaged hair.

Its main benefits involve softness, shine, easier detangling, and reduced friction. As a result, it may help limit some forms of hair-shaft breakage.

However, the benefits are mainly cosmetic and protective. Argan oil is not a proven treatment for pattern hair loss, alopecia areata, scarring alopecia, infection, or inflammatory scalp disease.

Use a small amount and choose a method that suits your hair type. In addition, patch test new products and stop using them if irritation develops.

If you have ongoing shedding, bald patches, scalp pain, severe dandruff, or visible thinning, seek professional evaluation rather than relying on oil alone.

Next step: For persistent hair or scalp concerns, find a trichologist near you.

Medical disclaimer: This article is for general educational purposes only and does not replace medical advice, diagnosis, or treatment. Argan oil may support cosmetic hair and scalp care, but hair loss, scalp inflammation, infection, or persistent dandruff should be evaluated by a qualified healthcare professional, dermatologist, or trichologist.