If a man has recently noticed that his pubic hair has turned white, if only a single, single pubic hair turns white it is a degenerative disease, mainly due to a physiological deficiency of synthetic melanin. It is mainly seen when there is degenerative disease in the body when there is recent exertion, excessive psychological stress, late nights or lack of energy. If through normal conditioning, the phenomenon of whitening will not continue to progress, no special treatment is needed, you can improve the diet structure, maintain good habits of life, work and rest. If the whitening of pubic hair gradually increases, and at the same time the patient will have uncomfortable symptoms, such as lack of energy, physical strength, weakness of the waist and knees, easy to sweat, and even easy to catch a cold or fever, it is mostly caused by the lack of immunity of the human body, or there are other diseases causing local manifestations. Therefore, it is necessary to go to the hospital for a systematic examination to clarify whether there are abnormalities in the endocrine system or changes in the skin, hair and mucous membranes due to some specific diseases, such as paraneoplastic syndrome.