Scalp care

Your scalp is skin. It has oil glands, a barrier and a microbiome, and it responds to everything skin responds to. Most people treat it as an inconvenience between shampoo and hair, which is why so many hair problems start there and never get solved.

What's actually going on: flaking has two common causes and they are opposites. A dry, tight, lightly flaking scalp is barrier damage, usually from over-washing or harsh surfactants. Greasy yellowish flakes with itching are usually seborrhoeic dermatitis, driven by a yeast that lives on everyone's skin and overgrows on some. Treating the second like the first, with oil and gentleness, feeds it.

Tier 1, dry and flaky: wash less often → switch to a gentler shampoo → stop scratching with your nails, use fingertips → rinse properly, because leftover product is a common cause. Skip oiling for a few weeks and see what changes. Give it three weeks.

Tier 2, greasy flakes and itch: an anti-dandruff shampoo with zinc pyrithione, ketoconazole or selenium sulphide, used properly. Properly means leaving it on the scalp for three to five minutes before rinsing, two or three times a week, not lathering and immediately washing it off. Most people who say these do not work were not leaving them on.

Tier 3, painful, spreading, bleeding, or bald patches: dermatologist. Psoriasis, fungal infections and alopecia areata all look like bad dandruff to a non-specialist, and they need different treatment. This is not a failure state, and a consult costs less than three shampoos.

Honest expectations: flaking improves in two to three weeks with the right approach. Seborrhoeic dermatitis is managed, not cured, and it returns when you stop or when the weather changes. Plan for maintenance, not victory.

Watch out for: the oiling habit. Weekly oiling is a genuine cultural tradition and it can help a dry scalp, but if your flakes are greasy and itchy, oil makes it worse, because the yeast involved feeds on certain oils. If oiling has never helped your dandruff, that is information, not a failure to do it correctly. Also watch out for heavy fragrance in scalp products, which is a common irritant on already-inflamed skin.

Plays well with: niacinamide and panthenol in leave-on scalp products, and salicylic acid at low strength for buildup. Treat the scalp like the face it is.

The BYOUT Library is educational content, not personalised medical advice. For persistent or severe skin concerns, a dermatologist beats any article, including ours.