Boys sweaty hair may be related to heredity, hormone endocrine abnormality, drugs and other factors. 1. Heredity: male hairy may be related to heredity, genetic genes do not only come from parents, there may be intergenerational inheritance. 2. Hormone endocrine abnormality: when the male body hormone secretion abnormality, especially androgen secretion exuberant, there will be exuberant sweating performance, at the same time there may be rough voice, body oil secretion, irritability, irritability, seborrheic alopecia and other performance. 3. Drugs: Long-term use of glucocorticoids or hair growth drugs minoxidil can also cause boys to sweating hairy. There may be other reasons for boys to be sweaty, it is recommended to go to the hospital in time to improve the examination, clear the cause of the disease, give targeted treatment.