How are crabs caused?

Patient's question:

Recently, I've been itchy downstairs. Sometimes it's unbearable, and other times it's okay. Today, I suddenly noticed lice on the roots of my pubic hair. I caught a few, and my husband caught dozens down there. How can lice grow downstairs? It's so disgusting. Doctor, how are pubic lice caused?

Doctor's answer:

Pubic lice are an infectious skin disease caused by parasitic infestation, usually resulting from poor personal hygiene. They can also be caused by long-term exposure to damp and dark environments. To treat them, you can shave the pubic hair and apply various creams under the guidance of a doctor. It’s important to maintain good hygiene, relax, and avoid scratching the affected area to prevent localized infection.

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