The appearance of whiskers in 8-year-old boys may be precocious puberty, which should be treated with medication, and may be caused by tumors, which can be treated with surgery. Precocious puberty in boys refers to the development of secondary sexual characteristics before the age of 9, such as testicular enlargement, penis enlargement and thickening, pubic hair, beard growth, and voice lowered. Commonly used drugs for precocious puberty are gonadotropin-releasing hormone analogs, which can reduce sex hormone secretion to pre-pubertal levels, and it is generally recommended to stop the drugs at age 11. In addition, it should be noted that precocious puberty in boys is mostly secondary to organic lesions, and attention should be paid to finding the primary cause of the disease and treating the cause. For example, tumors should be treated with surgery or radiotherapy; hypothyroidism should be treated with thyroid hormone supplementation. The above treatments and examinations should be carried out under the guidance of a doctor. 8-year-old boys with long whiskers should be taken seriously by their parents and actively consulted.