Why is my hair so oily and dandruff? When the weather is hot.

Causes of hair oil: oily hair, also known as "oily hair", is caused by exuberant sebum secretion. This kind of hair has strong erosion resistance, but it is not elastic enough. Because there is a lot of hair oil, it is not conducive to hair growth, and it is easy to cause seborrheic alopecia after a long time.

Causes of dandruff: Dandruff is the product of head skin metabolism. Teenagers have strong metabolism and are prone to dandruff. Excessive dandruff can be prevented from the following aspects.

1. Pay attention to scalp hygiene. Wash your hair with warm water frequently, usually once a week 1 time, and every 3 ~ 4 days 1 time if necessary. It is not advisable to use strong alkaline soap when washing hair, because alkaline soap will stimulate keratinization of scalp epithelial cells and produce dandruff. You can wash your hair with sulfur soap or shampoo.

2. Comb your hair often. Combing your hair 2 ~ 3 times every morning and evening can promote scalp blood circulation, increase hair nutrition, be beneficial to hair growth and reduce scalp epithelial cell keratinization.

3. Quit smoking, drink less and avoid spicy and greasy food. Avoid scratching and scraping with sharp objects when itching.