Dandruff can be frustratingly persistent. You may change shampoos, wash your hair more often, or try home remedies, only to find the flakes returning a few days later.
Contrary to popular belief, dandruff is not simply caused by poor hygiene or a dry scalp. It can be linked to excess oil, scalp irritation, and the growth of a naturally occurring yeast called Malassezia.
Why does dandruff keep coming back?
Malassezia naturally lives on the scalp, but changes in oil production and the scalp environment can contribute to irritation and increased shedding of skin cells.
Dandruff can also be a recurring condition. Washing the hair may remove visible flakes temporarily, but the underlying problem can return. Stopping treatment as soon as the flakes disappear may also lead to another flare-up.
Why can summer make it worse?
Hot and humid weather can increase sweating and oil production, making dandruff more noticeable. Wearing helmets or hats for long periods and leaving sweaty or wet hair covered can also irritate the scalp.
Keeping the scalp clean and avoiding prolonged exposure to sweat may help reduce flare-ups.
Choose the right shampoo
If regular shampoo does not control dandruff, an anti-dandruff shampoo may help. Common active ingredients include ketoconazole, selenium sulfide, zinc pyrithione, and salicylic acid.
Use medicated shampoos according to their instructions. Some need to remain on the scalp for several minutes before being rinsed off.
For people who frequently experience dandruff, dermatologists may recommend continuing an anti-dandruff shampoo periodically even after symptoms improve.
Habits that can help
- Wash your scalp regularly, especially if it becomes oily or sweaty.
- Keep hats, caps, and helmets clean.
- Avoid leaving wet or sweaty hair covered for long periods.
- Avoid scratching the scalp.
- Follow the instructions when using medicated shampoos.
- If one product stops working, consult a dermatologist about trying another active ingredient.
When to see a dermatologist
If dandruff does not improve with proper treatment, or if the scalp becomes severely itchy, red, painful, or develops thick scales, consult a dermatologist. Persistent flaking may sometimes be linked to conditions such as seborrheic dermatitis, psoriasis, or eczema.
Dandruff may be common, but repeatedly changing shampoos or relying only on home remedies may not solve the problem. A consistent scalp-care routine and appropriate treatment can help keep recurring dandruff under control.
