Black nevus is a type of birthmark, but black hairy nevus cannot be removed with laser. Removing black hairy nevus with laser will cause lesions. The best way to treat black hairy nevus is surgery. Excision and treatment of black hairy nevus. Depending on the size of the black hairy nevus, there are several methods such as direct excision and suturing, excision and skin grafting, and burying an expander. The specific method that is most suitable needs to be known by an expert.