Why do you have crabs?

Pubic lice is a kind of infectious disease parasitized by lice on the external genitals. It is mainly caused by direct contact between people, and can also be indirectly transmitted through bedding, underwear and other items. Pubic lice are mainly manifested as severe itching of pubic hair, especially at night. It is mainly limited to the pubic region and can also involve the anus and lower abdomen with obvious itching. There are gray sand-like particles adhered to pubic hair, that is, lice eggs and slow-moving pubic lice, mainly manifested as scratches, blood scabs, etc., bleeding ecchymosis, black blood scabs can be seen on underwear, caused by bleeding at the blood-sucking place of pubic lice.