Fainting in the shower, there are several reasons, first, is due to lack of oxygen, in the shower because to close the doors and windows, in this confined space is easy to lead to lack of oxygen, and there is a lot of water mist can also aggravate the lack of oxygen, this time people in the shower for a long time inside easy to make the brain oxygen supply and blood supply is insufficient, will appear fainting this situation. Fainting when bathing should be promptly to the hospital for examination and treatment, in the hospital should be CT examination to exclude cranial cerebral hemorrhage. Second, fainting in the bath may also be caused by lower blood pressure, the bath due to hot water in the skin surface for rinsing, will lead to the expansion of the whole body capillaries, so that the blood pressure drops, the amount of blood return is not enough, will appear fainting this phenomenon, because once the amount of blood return is not enough, the brain blood supply will also be a problem, will lead to fainting this phenomenon occurs.