8-year-old boys have moustache is generally abnormal, may be premature sexual maturity, hyperthyroidism and other causes.
1. Precocious puberty: eating some hormone-containing food for a long time, or staying up late for a long time, or tumors, endocrine diseases, etc., will lead to an imbalance of hormone levels in the body, precocious puberty, will start to grow a mustache at the age of 8.
2. Hyperthyroidism: the metabolic rate in the body of patients with hyperthyroidism will be accelerated, and the speed of beard growth will also be accelerated, so the 8-year-old boy has a moustache may be caused by hyperthyroidism.
If the 8-year-old boy has a moustache, it should be taken seriously, and promptly go to the hospital for examination, to clarify the cause of the disease, and then follow the doctor’s instructions to deal with or treatment.