If the patient suddenly faints when going to the toilet, the main consideration is vagal syncope, which is a type of reflex syncope. The patient may have vagal excitation during the process of going to the toilet at night, which may lead to vasodilatation, causing the heart rate to slow down and blood pressure to drop, which will cause a significant decrease in blood supply to the patient’s brain. Therefore, patients may have sudden syncopal episodes, transient loss of consciousness, and in severe cases, patients may be accompanied by symptoms such as urinary and fecal incontinence. This condition is usually easily induced when patients stand for a long time, cough, or urinate, but there are usually no obvious sequelae, and patients can wake up quickly within a short time. However, such patients must pay attention to protection to avoid unnecessary injuries caused by falls.