One is due to genetic problems, and the other is that androgen secretion in the body is relatively low or estrogen content is relatively high.

Guiding opinions:

Leg hair can be long, but it must be adhered to 1. At ordinary times to supplement protein. Pay attention to a balanced diet and supplement various vitamins. 2. Drink plenty of water, eat more fruits and avoid cold, hard and spoiled food. 3. Alcohol and spicy condiments are prohibited. 3. Exercise properly to enhance physical fitness and keep fit. 5. Slice ginger and wipe it repeatedly if necessary. 6. It is best to wash it every night.