Just after eating can not immediately take a bath, usually after eating a bath, the need for an interval of more than 30 minutes, for the following reasons: 1, because people just after eating, the blood in the body are densely distributed in the gastrointestinal tract of the gastric mucosa, so that the digestion and absorption of food, so the brain arteries, cardiovascular artery blood supply is relatively weak, relatively small, at this time, such as immediate bath, will increase the burden and load of the cardiovascular and cerebrovascular, resulting in a certain rate of cardiovascular disease. This will cause a certain rate of cardiovascular and cerebrovascular diseases; 2, just after eating immediately after bathing, will make the circumference of the capillary rapid expansion and expansion, at this time for digestion and absorption will have a negative impact on the body in the long run will cause digestion and malabsorption; 3, just after eating and bathing will cause transient syncope, cerebral artery blood supply is not complete, brain cells lack of oxygen, arterial oxygen saturation is reduced, the partial pressure of oxygen is rapidly low, The partial pressure of oxygen is too low rapidly.