This is a pigmented nevus with hair, which can be treated by surgical resection or dot matrix laser micro-stripping. If you have money, you can try the latter, but a few people have a relapse.

(Dr. Feng Aiping from wuhan union hospital solemnly reminds me that because I can't see the patient in person, I can't fully understand the condition. The above suggestions are for reference only. Please go to the hospital for specific diagnosis and treatment under the guidance of a doctor! )