Dandruff is replaced by the scalp keratinocytes and abnormally flaky, the cause is psoriasis, dermatitis, fungal skin, shampoo …
Doctor Le Thai Van Thanh, Department of Dermatology – Aesthetics, University Hospital of Medicine and Pharmacy, Ho Chi Minh City, said that for normal people, the scalp horny cells are replaced and gradually peeled off in small numbers. , sporadic for about a month. In some people, the keratinocyte replacement cycle is abnormally fast, causing the scalp cells to mature, peeling off into large plaques sooner, within 2-7 days, causing dandruff.
Reason Dandruff can be caused by an increase in sebum secretion coupled with the presence of the yeast malassezia furfur on the scalp of a sensitive person. Excessive sweating, chemical allergies to hair products, eating foods high in sugar and yeast or a stressful, stressful lifestyle also worsen dandruff.
In addition, itchy scalp can be caused by an itchy and flaky head condition such as psoriasis, dermatitis, and scalp fungus.
The symptom of psoriasis is a thick, scaly patch of skin that flakes easily. Contact dermatitis is clearly demarcated, red patches of skin that may or may not be scaly, especially if you have recently tried a new shampoo or skin cream.
Seborrheic dermatitis causes flakes that are smooth, scattered and slightly opaque yellow in color, irritating to red skin, with plaques or atrophy in the center, with follicles covered by keratinocytes discoid lupus.
Some other diseases, such as scalp fungus, cause irritation and redness, black inlays caused by keratosis or seasonal scalp itching. Dandruff often occurs when the scalp is dry, moisture drops, due to inappropriate hair care products, medications, metabolic disorders or poor hygiene … Sometimes helmets, hairpins, hats are worn. contact causes prolonged shutdown.
To treat dandruffYou can use natural remedies such as green tea and thyme. Green tea naturally exfoliates the skin without losing surface water.
To do this, take a cup of hot water and soak two tea bags for about 20 minutes or overnight. After the water cools, massage into the scalp. Another way is to boil some thyme with two cups of water for 10 minutes, let it cool and then pour half over damp hair, massage, not rinse. Use rest the next day.
Use a combination of shampoos containing selenium sulfide, zinc pyrithione, ciclopirox, ketoconazole, coal tar. Keep this for two to three weeks until the dandruff is gone. Rub the shampoo all over the scalp and hair, holding for 5-10 minutes before rinsing.
After dandruff is gone, maintenance shampoo should be used more than two to three times a week. Limit use of too many hair care chemicals, do not change too much shampoo. Avoid wearing tight hats for long periods of time.
Maintain a diet with adequate protein, vitamins and trace elements, avoid stress and stress.
If the scalp continues to itch and flake, you need to see a dermatologist to check and diagnose the cause.