The cause of back cold may be due to disease factors, strenuous exercise sweating and environmental factors. 1. Disease factors: For example, hypothyroidism is a generalized low metabolic syndrome caused by insufficient synthesis or secretion of thyroid hormones leading to hypothyroidism, or thyroid hormone resistance. As a result, the body’s heat production may be reduced, resulting in the appearance of a cold back. 2. Strenuous exercise sweating: when usually after strenuous exercise, a lot of sweating, and wearing less, easy to cause heat loss, long time to keep this, may also cause the phenomenon of the patient’s back cold. 3. Environmental factors: when the patient is in a cold environment, such as long-term air conditioning, or cold weather in winter, etc., may cause the phenomenon of the patient’s back cold, is a normal phenomenon, without treatment, should add clothes or away from the cold environment. It is important to note that if the patient has a cold back, excluding environmental factors and strenuous exercise, you should go to the hospital in a timely manner to find out the cause of the disease, active treatment, so as not to delay the condition.