Usually 30 minutes after eating is recommended to take a bath, it is not recommended to take a bath immediately after eating the following factors: 1, after eating, the blood is concentrated in the gastrointestinal tract, which contributes to the digestion and absorption of food. At this time, the bath will expand the surrounding capillaries, so that the peripheral capillary permeability increases, resulting in a further reduction in the amount of returned blood. Because of insufficient blood return, so after eating a bath, will make the heart’s blood supply capacity significantly reduced, resulting in coronary artery transient spasmodic ischemic attack, previous history of coronary artery disease patients is particularly dangerous. 2, immediately after eating a bath, but also aggravate cerebrovascular disease and hypertension and other diseases. Because the bath after the increase in capillary permeability at the same time, will also make the body of the skin temperature increases, this time for the cerebrovascular and hypertension patients are not favorable. Therefore, half an hour after eating a bath is good for the body.