If a patient becomes dizzy after standing up from the toilet, the first consideration is that it is related to postural hypotension. This disease is mainly due to a sudden change in blood pressure after a long period of squatting, which causes a short period of insufficient blood supply to the brain and induces dizziness. In severe cases, patients may experience blackness before their eyes. If the patient gets dizzy every time he stands up after going to the toilet, consider using a sitting toilet instead of a squatting one. Also, be careful to change position slowly, not too quickly. Patients with postural hypotension are more likely to be weak or have a history of anemia, so they should exercise more and drink more water.