Cold running sweat is not good, cold is short for acute upper respiratory tract infection, mainly because the body because of the decline in immunity, such as by the virus, bacteria, mycoplasma, chlamydia infection, caused by inflammatory reaction of the mucous membrane of the upper respiratory tract. The body’s immune response is relatively strong, there will be fluctuations in body temperature, and even the symptoms of a sustained rise in body temperature, body temperature rise in order to maintain the normal balance of body temperature, the body will take away the heat through sweating, to achieve the purpose of lowering the body temperature. If this time running is likely to aggravate the body’s energy consumption, so that more sweating and lead to dehydration, or even electrolyte loss of excessive pathological state, leading to electrolyte disorders, or even severe dehydration caused by dehydration shock state. From the point of view of Chinese medicine, running at this time the whole body capillaries are dilated state, it is easy to make the body by the outside cold invasion, cold will aggravate the body’s immune system to reduce the aggravation of the disease.