Patients in the process of bathing suddenly dizzy, almost fainted, mainly consider the following aspects of the cause: first, may be because of the bathroom environment, poor air circulation, the temperature is relatively high, resulting in the patient’s brain lack of oxygen; second, the occurrence of this situation of patients may be related to hypotension, hypoglycemia, if the patient is usually weak, bathing when consuming too much energy, easy to lead to brain tissue The third aspect, consider that it may be caused by low blood volume, because when people sweat more in the bath, it is easy to lead to dehydration, a transient lack of blood volume, which will lead to dizziness, nausea, vomiting, and even a fall attack; fourth, if the patient is an elderly person, there is cerebral arteriosclerosis, cerebral vascular stenosis, when in the bath vasospasm may occur and cause the above symptoms.