What is the white substance on the scalp after washing hair?

After washing your hair, a white layer appears on the scalp—this may indicate tinea capitis (scalp ringworm), Malassezia furfur infection, or excessive sebum production, among other causes. Specific possibilities are outlined below:

1. Tinea capitis: Dandruff-like scaling is commonly caused by fungal infection. Ketoconazole shampoo is recommended. Maintain a light, easily digestible diet rich in fruits and vegetables high in vitamins; avoid spicy and irritating foods, and ensure adequate sleep.

2. Malassezia furfur infection of the scalp: Since hair tends to retain moisture, Hillson’s solution is recommended for scalp cleansing. Additionally, consider trimming hair short, or taking oral vitamin B complex and zinc gluconate to help restore nutritional balance on the scalp. Avoid spicy and irritating foods, as well as harsh or irritating personal care products. Ensure sufficient sleep and maintain emotional calm.

3. Excessive sebum production: This typically results from overactive or dysregulated sebaceous gland secretion, which may be triggered by dietary factors, medications, or endocrine imbalances. Oral vitamin B2 and B6 supplementation may help suppress sebum production, while topical application of a 3% boric acid solution can aid in resolving dampness and promoting drying.

In daily life, proper skin care and healthy lifestyle habits should be prioritized.