If it is genetic factors, 30-year-old men who do not grow a beard is normal, if it is a pathological factor, 30-year-old men who do not grow a beard is abnormal, and should seek medical attention in time. 1. If the immediate relatives in the family are all adults without beard, and the development of secondary sexual characteristics is perfect, mostly normal, does not affect normal life. 2. If you have grown a beard more than 30 years after the shedding, it may be estrogen secretion exuberant, you need to go to the endocrine department for relevant examination to be able to confirm the diagnosis. 3. Some patients may suffer from follicular hypoplasia, generally accompanied by sweat gland hypoplasia, belonging to the skin accessory organ dysfunction, there are heat dissipation abnormalities, while not growing a beard. To summarize, it is recommended that the patient be examined according to his own situation and consult with the relevant specialists at the same time.