When bathing black eyes, fast fainting, there are usually several reasons: 1, the most common reasons such as hypoglycemia. In this case, the patient must be immediately moved to a cool, dry, ventilated place, and quickly replenish the glucose, to quickly decompose into simple sugar drinks to supplement the best effect, such as thick sugar water and chilled sweet drinks are feasible in this way and method. 2, black eyes and fainting in the shower, may be due to hypovolemia. Because the bath will sweat will lead to dehydration, so a transient low blood volume will cause hypovolemic shock, then you need to give the patient immediate rehydration, and wipe the body discharged excessive sweat, rehydration to supplement warm water is appropriate, the conditions can be supplemented with sugar saline. 3, the bath when the eyes black may also be due to a transient cerebrovascular blood supply deficiency, or lack of oxygen caused by. At this time, you need to immediately move them to a dry, ventilated room, and a lot of oxygen, to avoid the state of warm and wet, lack of oxygen, such as the conditions sent to the hospital for oxygen therapy treatment.