After exercise stomach cold may be the environment cold, abdominal vasoconstriction, a lot of sweat and other factors. 1. Cold environment: exercise may be due to increased body heat production, and take the initiative to take off the clothes, clothes on all know the role of insulation may be weakened. If the environment is cold at this time, under the stimulation of the cold may appear after the exercise of the stomach cool situation. 2. Abdominal vasoconstriction: exercise may appear sympathetic nerve excitation, the arterial blood vessels of the human skin will be contracted, so as to ensure that the heart, brain and other organs can have enough blood supply. When the abdominal arterial vasoconstriction, rich in oxygen and heat of the arterial blood to the surrounding tissues of the perfusion is weakened, may also appear after the exercise stomach cold. 3. A lot of sweating: the human body in the exercise may appear a lot of sweating, sweat in the evaporation process may take away the body’s heat, so that after exercise stomach cold may be a lot of sweating caused. When there is a cold stomach after exercise, usually do not need to worry too much, if necessary, timely medical treatment, under the guidance of the doctor to improve the relevant examination, clear cause, active treatment.