More than 8 years old boy a little lip hair most may be related to genetic factors, if there are other precocious performance may belong to the abnormal situation. 1. Normal situation: 8-year-old boy if parents or grandparents and other relatives, sweat hair is more serious case, the boy’s lip hair will also be more serious, this and genetic factors related, do not have to worry too much and nervous. 2. abnormal situation: more than 8 years old boy if accompanied by a knot in the throat or voice changes, this situation will need to go to the hospital for relevant examinations, if it is determined to be caused by precocious puberty, then you need to use sex hormone inhibitors under the guidance of the doctor. Children have more lip hair, generally do not use a knife to scrape, may lead to scratching the skin, infection, and do not use the hand to pluck, may lead to more and more dense lip hair. It is recommended to consult a doctor as soon as possible to clarify the diagnosis and then carry out targeted treatment.