Hair loss is autosomal dominant inheritance, and its genetic characteristics need to be expressed under the action of androgen.

2. Neuropathic alopecia

When mental stress is too great, hair loss tends to increase.

3, endocrine alopecia:

The growth of hair is influenced by many endocrine hormones, so when the endocrine is abnormal, it will often cause alopecia diseases such as postpartum and menopausal alopecia.

4, nutritional alopecia:

Malnutrition and abnormal metabolism will cause changes in hair quality and hair color, severe malnutrition and even diffuse alopecia.