A man’s lack of beard growth may be caused by genetic factors, or it may be caused by insufficient androgen secretion, insufficient nutritional intake, and other factors; among them, the lack of beard growth caused by genetic factors is usually normal. A man’s ability to grow a beard may be affected by family genetics, and in such cases it is a normal phenomenon that does not require special concern. If the lack of nutrient intake during puberty, resulting in malnutrition, can also cause slow hair growth resulting in not growing a beard; or due to impaired testicular function, androgen deficiency and other conditions caused by the androgen secretion decrease; the above situations are not normal. If it is a pathological factor that causes a man not to grow a beard, it is recommended to go to the hospital for medical treatment.