How to Get Rid of Dandruff: First, Understand What's Happening on Your Scalp

Flakes on your shoulders. An itchy scalp. Maybe some redness or irritation that seems to come and go.

Naturally, you assume it's dandruff.

So you buy an anti-dandruff shampoo, use it a few times, and hope for the best.

But what happens when it doesn't work?

Or worse, when your scalp feels even more irritated?

Here's something I've seen countless times throughout my career behind the chair.

Not every flaky scalp is dandruff.

And treating every scalp condition the same way can sometimes make an already uncomfortable situation worse.

As a hairstylist and trichologist, one of the first things I want to understand is what we're actually dealing with.

Because flakes are a symptom.

They're not a diagnosis.

First, What Exactly Is Dandruff?

Dandruff is a common scalp condition associated with increased shedding of visible skin cells.

It's generally considered a mild form of seborrheic dermatitis, a condition that can also involve inflammation, itching, and redness.

One of the contributing factors is Malassezia, a group of yeasts that naturally live on human skin.

Yes, yeast.

And before you panic, having yeast on your scalp is completely normal.

The issue isn't simply that it's there.

It's how the scalp responds to it.

In susceptible individuals, interactions between Malassezia, scalp sebum, the skin barrier, and the immune response can contribute to irritation and increased flaking.

Genetics, environmental conditions, and individual skin characteristics may also play a role.

So dandruff isn't necessarily caused by poor hygiene.

And it isn't simply the result of washing your hair too often.

Is It Dandruff or a Dry Scalp?

This is where things can get confusing.

Both can cause visible flakes and itching, but the underlying mechanisms may be different.

A dry scalp generally involves insufficient moisture in the outer skin layers or disruption of the skin barrier.

Dandruff is more closely associated with seborrheic dermatitis and its inflammatory processes.

Some Common Differences

But these are clues, not a reliable at-home diagnostic test.

Flake size and appearance alone can't confirm the cause.

And other scalp conditions can look remarkably similar.

Psoriasis, eczema, allergic contact dermatitis, and certain fungal infections can all produce scaling.

That's why persistent or unexplained flaking deserves a closer look.

1. If Your Scalp Is Dry, Start With the Skin Barrier

Living in a dry climate, spending time in heated indoor environments, or using products that irritate your skin can contribute to scalp dryness.

And yes, those Canadian winters can be particularly unkind.

But the answer isn't necessarily to stop washing your hair or start applying heavy oils.

I'd begin by looking at your current routine.

Are you using a strongly cleansing shampoo when your scalp doesn't need one? Are you washing with very hot water? Have you recently introduced a new product? Are you experiencing dryness elsewhere on your skin?

A gentle shampoo and appropriate scalp-compatible moisturizing products may help.

Avoid excessively hot water and vigorous scrubbing.

And if your scalp is sensitive, be cautious with fragrances and essential oils.

What About Drinking More Water?

Staying adequately hydrated is important for general health.

But drinking extra water doesn't necessarily correct a dry scalp when the underlying issue involves skin-barrier function, irritation, or a dermatological condition.

And here's another misconception worth clearing up.

Your scalp isn't necessarily "thirsty" for hair conditioner.

Hair conditioners are primarily designed to improve the feel and manageability of the hair fibre.

Some may be suitable for scalp application, but others can leave residue or irritate sensitive skin.

If your scalp needs moisturizing support, choose a product formulated for scalp use.

2. If It's Dandruff, Choose Ingredients That Address the Condition

When dandruff is associated with seborrheic dermatitis, treatment often involves managing Malassezia activity and scalp inflammation.

This is where appropriately formulated anti-dandruff shampoos can be useful.

Common active ingredients include:

• Ketoconazole: An antifungal ingredient used to manage Malassezia-associated scalp conditions.

• Selenium sulfide: Helps manage dandruff through antifungal and other effects on scalp scaling.

• Zinc pyrithione: An anti-dandruff ingredient available in some markets, although its regulatory status varies by country.

• Salicylic acid: Helps loosen and remove accumulated scales, but doesn't directly address every underlying cause.

• Coal tar: Used in certain medicated scalp products to help manage scaling and inflammation, although suitability varies.

Availability and product formulations differ by country, so follow the instructions on the specific product.

Some shampoos need to remain in contact with the scalp for several minutes before rinsing.

And that matters.

If you're applying a treatment shampoo and rinsing it away immediately when the label instructs otherwise, you may not be getting the intended benefit.

Can Dandruff Be Cured?

Dandruff and seborrheic dermatitis often have a recurring course.

Treatment can control symptoms, sometimes very effectively, but there isn't a guaranteed permanent cure.

Some people need occasional treatment during flare-ups.

Others benefit from a maintenance routine.

The goal is to manage the condition and support scalp comfort, not promise that one shampoo will eliminate it forever.

3. Should You Wash Your Hair Less Often?

This is one of the biggest pieces of advice I'd change from my earlier writing.

I used to see recommendations suggesting that people with dandruff should reduce shampooing to once or twice a week.

But that isn't appropriate for everyone.

In fact, for some people with oily scalps and seborrheic dermatitis, more frequent cleansing can be beneficial.

Sebum and accumulated scalp debris may contribute to the environment in which dandruff symptoms develop.

But washing frequency still needs to be individualized.

Someone with a very oily scalp may need more frequent washing than someone with a dry, sensitive scalp.

Hair texture, styling practices, scalp condition, and the products being used all matter.

The goal isn't to wash as little as possible. It's to wash as often as your scalp needs.

And no, shampooing doesn't automatically trigger your scalp to produce excess oil to compensate for what was removed.

Sebum production is primarily regulated by biological factors, including hormones and sebaceous gland activity.

4. What About Tea Tree Oil and Other Natural Remedies?

Tea tree oil is often promoted as a natural dandruff remedy.

And there is some limited research suggesting that appropriately formulated tea tree oil shampoos may help reduce dandruff symptoms.

But that doesn't make tea tree oil a guaranteed cure.

It can also cause irritation or allergic contact dermatitis in some people.

And applying concentrated essential oils directly to an already inflamed scalp isn't something I'd recommend.

The same caution applies to homemade blends containing peppermint, rosemary, lavender, thyme, or other essential oils.

Natural ingredients are still chemically active substances.

Natural doesn't automatically mean gentle.

And mixing essential oils into a shampoo at home can affect the formulation and create unpredictable concentrations.

If you're interested in botanical ingredients, I'd rather see you choose a properly formulated, tested product than experiment on an irritated scalp.

5. Should You Apply Coconut Oil or Olive Oil Overnight?

This is another popular recommendation.

Oils can help lubricate the hair fibre, and certain oils may be useful in some skin-care contexts.

But that doesn't mean overnight scalp oiling is the best treatment for dandruff.

With seborrheic dermatitis, heavy oil application may be poorly tolerated by some individuals and can make buildup or scaling more difficult to manage.

The effects depend on the specific oil, formulation, and scalp condition.

If your scalp is inflamed, itchy, or producing significant flakes, I wouldn't automatically reach for the kitchen cupboard.

I'd first want to understand why it's happening.

6. Do Hats, Sweat, or Hair Extensions Cause Dandruff?

Not directly.

Sweat, occlusion, friction, and product buildup can aggravate scalp discomfort in some people.

But wearing a hat doesn't automatically cause seborrheic dermatitis.

And having thick hair doesn't mean you're creating a fungal infection because your scalp is dark and warm.

Remember, Malassezia is part of the normal skin microbiome.

Dandruff is more complicated than simply providing yeast with a warm place to live.

That said, scalp hygiene still matters.

If you exercise frequently, wear protective head coverings, or have semi-permanent hair extensions, make sure you're cleansing your scalp appropriately and following suitable drying and maintenance practices.

You shouldn't have to cut your hair short or stop wearing hats simply because you have dandruff.

7. Can Cold Water Close Your Scalp's Pores?

No.

Pores don't open and close like little doors in response to water temperature.

And rinsing with cold water doesn't seal the hair cuticle shut or prevent dandruff.

Water temperature can affect comfort, and very hot water may aggravate dryness or irritation.

But there's no need to finish every shower with an icy rinse.

Use a comfortable temperature, generally lukewarm, and focus on appropriate cleansing and scalp care.

8. When Flakes Aren't Dandruff

This is probably the most important part of the conversation.

Several scalp conditions can cause flaking, and they don't all respond to dandruff shampoo.

Scalp psoriasis may produce thicker, more adherent scales and areas of inflammation.

Atopic or contact dermatitis may involve itching, irritation, and reactions to products or ingredients.

Tinea capitis, a fungal infection of the scalp, may cause scaling, broken hairs, and areas of hair loss. It generally requires prescription oral antifungal treatment rather than ordinary dandruff shampoo alone.

And some inflammatory scalp disorders associated with hair loss may initially appear as scaling or irritation.

If you're noticing persistent redness, pain, crusting, sores, broken hairs, or hair loss alongside your flakes, seek appropriate medical assessment.

9. What About Cradle Cap in Babies?

Cradle cap is a common form of infantile seborrheic dermatitis.

It often appears as greasy or yellowish scales on a baby's scalp.

In many cases, it's harmless and resolves over time.

Gentle washing with a mild baby shampoo and careful loosening of scales may be sufficient.

Avoid aggressively picking or scraping the scalp.

If the scales are thick, widespread, inflamed, or accompanied by other symptoms, speak with a pediatrician before trying medicated shampoos, essential oils, or home treatments.

Babies' skin deserves extra care.

So, How Do You Actually Get Rid of Dandruff?

Start by making sure dandruff is what you're dealing with.

If you have mild, typical dandruff, an appropriate over-the-counter anti-dandruff shampoo may be a reasonable starting point.

Use it as directed and give the treatment an appropriate amount of time to work.

If symptoms persist, worsen, or keep returning despite treatment, the next step isn't necessarily buying another shampoo.

It may be time for a closer assessment.

And if you're experiencing significant inflammation, scalp pain, or hair loss, medical evaluation is important.

The Hair Coach Perspective: Flakes Are Information

One of the things I've learned from working with hair and scalp concerns is how often people treat what they can see without understanding what's causing it.

Flakes appear, so we reach for dandruff shampoo.

The scalp feels dry, so we add oil.

It itches, so we scrub harder.

But those approaches aren't always appropriate.

Your scalp is living skin, with its own barrier function, microbiome, immune activity, and physiological needs.

And just like the skin on the rest of your body, it can respond differently to different products and environmental influences.

That's why I encourage people to look beyond the flakes.

Are we dealing with dryness, inflammation, seborrheic dermatitis, a product reaction, or something else entirely?

Because once you understand what you're seeing, you can make much better decisions about how to care for it.

Don't just treat the flakes. Understand the scalp.

Start With Understanding.

Kerri Jarrett
Certified Trichologist | Red Seal Hairstylist
The Hair Coach

Not Sure What's Happening on Your Scalp?

If you're dealing with persistent flaking, itching, irritation, or changes in your scalp, a trichology assessment can help document visible patterns, review your hair-care routine, and identify when further medical evaluation may be appropriate.

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