Flaking
Not all flaking is dandruff, and not all dandruff is dryness. What the flakes look like and how they behave tends to matter more than how many there are.
01 What it is
Flaking is visible shedding of skin cells from the scalp. It ranges from fine dry powder to larger greasy yellowish scale to thick silvery plaques, and those tend to point in different directions.
The most common cause of persistent flaking is seborrhoeic dermatitis, which is an inflammatory condition rather than a dryness problem, which is why treating it as dryness so often fails, and why heavy oils sometimes make it worse.
02 Recognition
What people usually notice
- Fine white flakes on dark clothing, worst a few days after washing.
- Larger, greasy, yellowish scale that lifts in sheets.
- Thick, well-defined silvery patches extending past the hairline.
- Flaking that comes with itching, redness or tenderness.
- Flaking that improves in summer or on holiday and returns afterwards.
- Flaking that appeared after a new product.
03 Contributors
What may contribute
Grouped by how well supported each one is. That distinction matters more than the list itself.
Well established
- Seborrhoeic dermatitis, involving the skin's response to yeasts that live there normally.
- Scalp psoriasis, which typically produces thicker, more defined plaques.
- Contact dermatitis from a product.
- Genuine dryness, which is less common than assumed and usually accompanied by dryness elsewhere.
Commonly associated
- Seasonal change, particularly cold dry winters and central heating.
- Stress and sleep disruption.
- Infrequent washing, which allows scale and sebum to accumulate.
- Heavy styling products and dry shampoo used repeatedly between washes.
Debated or unsupported
- Treating all flaking with oils and heavy conditioners. This frequently makes seborrhoeic dermatitis worse.
- Diet as a primary driver, which is often claimed and rarely well supported.
- Physical scrubs and exfoliants on inflamed skin.
04 Uncertainty
What we don’t know
- Why the same organisms live on everyone's scalp but only some people's skin reacts to them.
- Why flares follow the pattern they do in an individual.
Worth doing first
When to bring a doctor in
- If plaques are thick, well-defined, or extend onto the face, ears or body. This may be psoriasis and benefits from a diagnosis.
- If there is hair loss from the affected areas.
- If the skin is broken, weeping, crusted or painful.
- If it does not respond to a properly used medicated shampoo within a few weeks.
- In children, where fungal infection needs to be excluded.
If any of this applies, see a doctor first. It’s the quickest way to an answer. Bring what they tell you back to me and we’ll work out what it means for you.
05 Consultation
What a consultation can explore
- What kind of flaking this actually is, which changes everything that follows.
- The complete product and washing routine.
- Whether medicated shampoos have been used correctly. Most have not, and contact time is the usual reason.
- Triggers and seasonal pattern.
- Whether hair loss is occurring alongside it, and in the same places.
- A sustainable routine rather than a short intensive one.
Medicated shampoos are medicines with instructions. Most of the failures I see are dosing failures, not product failures.
What happens next
Book
Online, wherever you are. You’ll receive a questionnaire and a prep sheet, and I read both before we meet.
We look at it properly
History, assessment, findings, and time for the questions you came with.
You get it in writing
A summary you can act on, sit with, or hand to your doctor.
This page describes what people commonly experience. Reading it isn’t the same as having someone look at your situation properly, and it can’t tell you which of these you have. That’s what the consultation is for.
Sources and further reading
- DermNet Seborrhoeic dermatitis
- DermNet Scalp psoriasis
- NHS Dandruff
- British Association of Dermatologists Scalp psoriasis: patient information leaflet
Written by Brigita Deveikaite, certified trichologist (VTCT Skills (ITEC) Level 4 Certificate in Trichology for Hairdressers, Trichocare). Last reviewed . This page is educational and is not a diagnosis.