Elderly waist cold mainly has two aspects of the reasons, namely, internal and external causes, as follows: 1, internal cause is because of the elderly with the age of the body weakened, in traditional Chinese medicine is called the deficiency of the liver and kidneys, immunity to decline, when the body becomes weak when the feeling of the external evils, wind evils or cold evils will be more likely to produce the symptoms of the body, young people with normal body resistance to the feeling of the wind evils and cold evils through their own resistance to defense. Can defense, but the elderly with the growth of age will lead to weakening of the defense ability, so there will be a cold waist. 2, external causes, such as blowing fans, air conditioning or cold, young people may be mild blowing fans or cold does not matter, but the elderly because of their own constitution, resistance decline, a slight wind chill may cause symptoms, so the elderly in the sleep of the heat preservation is very important, the two causes are the elderly waist cold. The two reasons are the main reasons for the elderly waist cold.