The short explanation
Persistent flaking with an itchy scalp is very common, and it often does not settle with ordinary or frequently changed shampoos. Most dandruff is linked to seborrhoeic dermatitis, a tendency of the scalp to react to a yeast that normally lives on skin. Medicated anti-dandruff shampoos containing ingredients that act against this yeast tend to work better than cosmetic ones, but they need to be left on the scalp for a few minutes and used consistently. If medicated shampoos have not helped, the flaking may be something other than simple dandruff. Scalp psoriasis, fungal infections of the scalp, contact reactions to hair dyes or oils, and eczema can all look similar. A dermatologist can tell these apart by looking at the scalp, and the treatment differs for each.
What depends on your situation
The parts of this that change from woman to woman. Uncertainty is stated, not hidden.
- Heavy oiling of the scalp, a common practice, can sometimes worsen seborrhoeic dermatitis in some people.
- Stress, cold dry weather and infrequent washing can make flaking worse.
- If the flakes are thick, silvery, extend beyond the hairline, or you have similar patches on elbows or knees, psoriasis is more likely.
What this answer cannot determine
The boundary of online education. These need a clinician who can see you.
- This cannot tell you what is causing your scalp flaking. A dermatologist needs to examine your scalp to decide.
Questions for your clinician
Take these with you. You can add any of them to an appointment card.
- Is this dandruff, psoriasis or a fungal infection?
- Which type of medicated shampoo should I try, and how should I use it?
- Could my hair oil or dye be contributing?
- What should I do if it keeps coming back?
When to seek help
Clinician-approved guidance for this topic. When in doubt, being seen is never the wrong choice.
Book an appointment soon
- See a doctor within a few days if your scalp is painful, oozing, has bald patches or swollen glands in the neck.
Raise it at a routine appointment
- Book a routine dermatology appointment if itching and flaking continue despite medicated shampoos.
Sources
The evidence this explanation is built on.
- Dandruff NHS
- Psoriasis MedlinePlus (NIH)
- Fungal infections MedlinePlus (NIH)
Who wrote and reviewed this
Every AskHer answer names its author. A clinically reviewed answer also names the clinician who signed it off — if no clinician is named below, it has not been clinically reviewed.
- Author
- AskHer Editorial (AI-assisted draft) AskHer's editorial team — not an individual clinician Works in English, தமிழ், हिन्दी
- Clinical reviewer
- Nobody yet No clinician has signed this answer off, and no person on the editorial team has read it yet. That is what the “Written with AI assistance” label means. It is queued for an editor to read, and then for a clinician who works in this area. The sources it was drafted against are listed above.
- Review status
- Written with AI assistance — not yet reviewed by a person
- Last reviewed
- Not yet reviewed by a person
- Version
- 1
Correction history
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No corrections have been made since this answer was first published.
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