There are several reasons for fainting in the shower: 1, may be their own before the shower did not eat food, drink water, it is recommended that before the shower must eat food, drink water, because the shower needs to waste a lot of physical strength, will also consume water in the body, if they do not add enough water, it is easy to faint phenomenon; 2, may be caused by their own high blood pressure, usually pay attention to the hospital regularly to measure their Blood pressure, in the diet also try to eat low-fat food; 3, low blood sugar patients are prone to fainting in the shower, such patients in the shower before, must be enough water, sugar for the body; 4, may be their own cardiovascular and cerebrovascular disease, caused by this symptom, in order to be safe, it is recommended that patients go to a regular hospital to do a comprehensive examination.