Sweating under the covers when you have a cold can’t be said to be good or bad, it may be a heat withdrawal sweat phenomenon caused by fever, which belongs to the disease state. Colds are caused by viral infections, and when viruses invade the body, they produce endogenous pyrogen such as inflammatory factors, leading to abnormalities in the thermoregulatory center and causing fever. At this time, the body will rebalance the body temperature, through sweating to take away the body heat, to achieve the purpose of cooling. During this period of time, pay attention to keep warm, drink more boiled water, to prevent excessive loss of body fluids and cause defecation. It is recommended to use a warm dry towel to wipe away sweat when sweating to avoid getting cold. During a cold, keep the indoor air fresh, the temperature and humidity appropriate, avoid getting cold, eat a light diet, take care of rest and monitor body temperature. Sweating is not entirely caused by colds. It is recommended that if you have frequent sweating, you should consult a doctor for a clear diagnosis and standardize the use of medication under the guidance of a doctor.