Fainting on the toilet and waking up after a while may be caused by neuroreflex syncope, postural hypotension, and severe iron deficiency anemia. In terms of treatment, the main thing is to treat the original disease. 1. Neurological reflex syncope: it is usually induced by exerting oneself to urinate, keeping squatting position or standing position for a long time, or excessive fatigue, mental overstress, getting up too fast, etc., which may cause fainting in the toilet and waking up after a while. There is no special treatment for this disease, and avoidance of triggers is the main focus. 2. Postural hypotension: If you keep squatting position for a long time when you go to the toilet, when you suddenly get up quickly, it is easy to induce postural hypotension, resulting in insufficient cerebral perfusion, which may cause fainting in the toilet and wake up after a while. Generally, no special treatment is needed. If the symptoms recur, Midodrine hydrochloride can be applied for treatment. 3. Severe iron deficiency anemia: because of the body’s low blood volume, resulting in the brain in a chronic lack of oxygen, if a long time squatting toilet, suddenly get up, easy to aggravate the lack of oxygen in the brain tissue, may cause fainting in the toilet a moment to wake up. After a clear diagnosis, iron agents such as ferrous sulfate and iron dextrose can be applied to correct anemia and improve the above symptoms. If the symptoms recur frequently, it is recommended to consult a doctor as soon as possible, after a clear diagnosis of the cause, to give targeted treatment.