The causes of redness and warmth after exercise include physiological factors and pathological factors, of which most patients are due to physiological factors. 1. Physiological factors: under normal circumstances, the human body during exercise, the body’s sympathetic nerve excitation, norepinephrine and epinephrine secretion increases, which will lead to the contraction of the skin capillaries, cardiac muscle contraction force enhancement, skeletal muscle vasodilatation. After the exercise, the sympathetic nerve excitement decreases, the skin capillaries are congested and dilated for a short time, and the phenomenon of redness and heat will appear. 2. Pathological factors: If you blow cold wind during exercise, your body’s resistance decreases and you are prone to colds. During the cold, the body will mobilize the whole body’s immune system to resist the pathogen infection, there will be a rise in body temperature, facial capillary expansion, there will be a phenomenon of redness and heat on the face. It is recommended that the patient according to their own situation, if it can not be relieved by themselves, need to go to the regular hospital in time to avoid delaying the condition.