The most common type of temporary memory loss is transient global amnesia, referred to as TGA, which is a special manifestation of cerebral ischemia, manifested as sudden memory loss lasting less than 24 hours, which will gradually improve, during the attack the patient will repeatedly ask a question, and after others answer he forms no memory, and after the attack recall this period is also blank, this is a relatively special cerebral ischemia, and It is related to cerebrovascular disease, and usually has risk factors of hypertension and diabetes, and often has triggering factors such as emotional excitement, cold or headache before the onset. In addition to TGA, there are also specific types of epilepsy that manifest as transient amnesia, where the patient may have an abnormal EEG, as well as seizure symptoms such as twitching of the arms and legs. There is also a special type that is functional, sometimes called hysteria, and is related to emotional excitement, which is often seen in young women with emotional patients.