Getting up from the toilet and suddenly fainting for a few seconds and waking up is fine, which may be related to postural hypotension, or may be caused by transient ischemic attack, cardiogenic syncope and other reasons. 1. Postural hypotension: when you get up from the toilet, if you get up too fast and too violently, it is likely to induce postural hypotension, resulting in insufficient perfusion of brain tissue, which may cause sudden fainting for a few seconds, and may also be accompanied by dizziness, transient blackness, etc., which can be relieved after rest. 2. Transient ischemic attack: common in middle-aged and old people, patients often suffer from cerebral atherosclerosis, hyperlipidemia, hypertension and other underlying diseases. Transient ischemic attack is likely to be induced when they get up from the toilet, and they may show sudden fainting for a few seconds and wake up fine. 3. cardiogenic syncope: patients often suffer from arrhythmia, angina pectoris, coronary heart disease and other diseases, in the toilet up, it is likely to induce cardiogenic syncope, cardiac output suddenly sharply reduced, resulting in insufficient blood supply to the brain tissue, resulting in sudden fainting for a few seconds, wake up all right. Getting up from the toilet and suddenly fainting for a few seconds and waking up fine may also be caused by other reasons. If the symptoms are frequently repeated, or other symptoms, you should seek medical attention as soon as possible, after clarifying the causative factors, to give targeted treatment.