Flakes on a navy kurta can be embarrassing, and well-meaning advice tends to make matters worse: more oil, curd, lemon and vigorous scratching. The condition is common and usually manageable, but it tends to come back, so the aim is control and not a permanent cure.
Why it happens
Most adults carry a yeast called Malassezia on their skin. It feeds on oils from the scalp and produces by-products that irritate some people. The irritated scalp then sheds skin cells faster than usual, and they clump into visible flakes. Dandruff sits at the mild end of a condition called seborrhoeic dermatitis, which can also affect eyebrows, the sides of the nose and the beard area.
Some things can make flare-ups more likely:
- Winter in North India: dry air, very hot head baths and washing less often.
- Monsoon and summer humidity: sweat and an oily scalp, sometimes trapped under a helmet or cap.
- Leaving hair oil on for days: this gives the yeast more to feed on.
- Stress and poor sleep: many people report flare-ups during stressful periods.
Is it actually dandruff?
Flakes have more than one cause. This table can help you decide what to do next, but it can’t give you a diagnosis.
| What you see | It may be | What to do |
|---|---|---|
| Oily, yellowish or white flakes, mild itch | Dandruff or seborrhoeic dermatitis | Try an anti-dandruff shampoo |
| Small, dry, powdery flakes, tight-feeling scalp, worse in winter | Dry scalp | Gentler shampoo, cooler water, less frequent stripping |
| Itch or rash soon after a new hair dye or product | Contact allergy | Stop the product, and get medical advice for swelling or severe itch |
| Thick, silvery plaques, often at the hairline or behind the ears | Possibly psoriasis | Dermatologist |
| Scaly patches with broken hairs or hair loss | Possibly a fungal infection | Doctor promptly, particularly for a child |
Shampoo ingredients: what to look for
Ignore the front of the bottle and read the active ingredient. “Anti-dandruff” isn’t a guarantee of what is inside, and herbal extracts on their own have much less evidence behind them.
| Ingredient | What it does | Worth knowing |
|---|---|---|
| Zinc pyrithione | Reduces yeast on the scalp | A common, widely available starting point |
| Piroctone olamine | Reduces yeast | Often well tolerated and found in everyday shampoos |
| Selenium sulfide | Reduces yeast and slows flaking | Can leave an odour and may affect colour-treated hair |
| Ketoconazole | An antifungal that reduces yeast | Sold through pharmacies, so ask a pharmacist or doctor if it suits you |
| Salicylic acid | Loosens and lifts scale | Can be drying, so it suits flaky rather than dry scalps |
| Coal tar | Slows skin cell turnover | Strong smell, may stain light hair and can make skin more sensitive to the sun |
Some people find a shampoo works well for a while and then seems to do less. Swapping to a different active ingredient can be a reasonable next step.
Using it the way it is meant to be used
Most failures come from rushing. Anti-dandruff shampoo isn’t a quick rinse product.
- Massage it into your scalp, with your fingertips and not your nails. The scalp is where it needs to work, so don’t focus on the lengths.
- Leave it for the time on the label, often a few minutes. Use that time to wash the rest of your body.
- Rinse thoroughly, and keep it out of your eyes.
- Condition your lengths only, as these shampoos can leave hair dry.
- Repeat as directed. Many labels suggest a few times a week until things settle, then about once a week to keep flakes away.
If you wash with hard water, shampoo lathers less easily and rinses less cleanly, so spend a little longer on steps 1 and 3. Also check your forehead and hairline: flakes and hair products can both aggravate breakouts, which our acne basics guide covers.
Before using a new active ingredient, try a patch test, especially if you have reacted to hair products before. If you are pregnant or breastfeeding, ask your doctor which medicated shampoos are suitable before starting one.
Habits that help, and home remedies to skip
Worth doing: wash often enough to control oil, dry your scalp after a rainy commute, clean your helmet lining, and wash pillow covers regularly.
Worth skipping:
- Lemon, baking soda and toothpaste. These can irritate a scalp that is already inflamed, especially if you have scratched it raw.
- Heavy overnight oiling as a dandruff remedy. Read our hair oiling guide for when oil is a poor fit.
- Steroid creams or lotions without medical advice. They may calm the itch for a while, but they can thin skin and hide an infection.
- Scratching with combs or nails. It damages the skin and can lead to infection.
When to get help
See a dermatologist or doctor if:
- you have used an anti-dandruff shampoo properly for four to six weeks with little change
- your scalp is very red, painful, oozing, crusted or swollen
- you have thick, stuck-on scale or plaques
- you are losing hair in patches
- a child has a scaly scalp, as scalp ringworm is more common in children and needs medical treatment
- the rash is spreading to your face, ears, chest or elsewhere
Bottom line
Choose a shampoo by its active ingredient, give it contact time and keep using it once a week after the flakes settle. Don’t expect oil or kitchen remedies to do the same job. Get medical advice when the scalp is sore, the scale is thick or hair is coming out in patches.
Frequently asked questions
Is dandruff caused by a dry scalp?
Not usually. Dandruff is commonly linked to oil on the scalp and a yeast that lives on most people's skin. A dry scalp tends to give small, white, dusty flakes without much oiliness. The two can look alike, which is why a doctor's view helps if shampoos aren't working.
Does oiling get rid of dandruff?
It is unlikely to, and it may make things worse for some people. The yeast linked to dandruff feeds on scalp oils. Oil can loosen flakes and make them less visible for a while, but that isn't the same as dealing with the cause.
Is dandruff contagious?
Ordinary dandruff isn't considered contagious. A fungal infection of the scalp, such as ringworm, can spread, and it is more common in children. Patchy hair loss with scaling should be checked by a doctor, and combs or towels shouldn't be shared until then.
How long does an anti-dandruff shampoo take to work?
Many people notice a difference within a few weeks of regular use. If there is no improvement after about four to six weeks, or your scalp is getting worse, see a dermatologist.
