Usually, bathing is a process of energy consumption and negative nitrogen balance of the body, at this time there will be energy consumption and lead to lower blood sugar after bathing, when the body’s blood sugar is lowered, it will cause the corresponding lowering of blood pressure, but at this time the lowering of blood pressure is not very obvious and significant. Capillary permeability will increase after bathing, especially after bathing with hot water, the arteriovenous short circuit will be opened, which will also lead to insufficient filling of cardiovascular blood, and this will also cause a transient decrease in blood pressure. If hypotension exists in the past, a certain reflex hypotension may occur after bathing due to the change of position and intense exercise.