2, adolescent malnutrition, adolescent men are in a stage of vigorous growth and development, adequate nutrition, hormone content in the body is also rising, if malnutrition leads to slow hair growth, it will also lead to slow development of human height and secondary sexual characteristics, affecting the normal function of internal organs.
3, drug side effects, hormone drugs such as growth hormone, glucocorticoid, will effectively control inflammation in a short time, stimulate the body's development, long-term use will lead to a decline in the sensitivity of human target organs, the body's own growth hormone secretion has an antagonistic effect, leading to hair underdevelopment.