Boys with cold hands and feet may be cold, emotional tension and other physiological factors; may also be related to the lack of kidney yang (lack of yang energy of the kidneys), due to yang deficiency can not be warmed, so there will be a form of cold (cold body) cold limbs, the color of the face ，white (white and lack of luster) and so on. 1. Physiological factors. When men have symptoms of cold hands and feet, the first thing to consider is the possibility of physiological factors. If the outside temperature is too low, resulting in the invasion of cold air into the human body, the symptoms of cold hands and feet will often occur; secondly, in the emotional overstress, it will also affect the operation of qi and blood, and there will be a short period of cold hands and feet symptoms. 2. Pathological factors. Kidney is the root of yang, when the kidney yang deficiency, the body lost warm function, appeared in the face of white, cold limbs cold, waist and knee soft (waist and knee soft and weak feeling), impotence, dizziness and tinnitus, tongue pale moss white, weak pulse and other symptoms. Boys with symptoms of cold hands and feet should seek medical attention in a timely manner and actively find the cause of the disease.