People can lose their memory. The causes of memory loss include degenerative brain lesions, traumatic brain injury, insufficient blood supply to the vertebral basilar artery, and psychogenic memory loss. 1. Degenerative brain lesions: for example, Alzheimer’s disease, frontotemporal lobe dementia. Due to the atrophy or even death of nerve cells in the brain, or abnormal signal transmission between cells, resulting in cognitive dysfunction such as memory, language, calculation and behavior. 2. Traumatic brain injury: for example, concussion, brain contusion, etc. Such diseases will lead to brain dysfunction or damage to the medial temporal lobe, especially to the hippocampus, resulting in memory loss. 3. Insufficient blood supply of vertebral basilar artery: prolonged cerebral ischemia will lead to ischemia and hypoxia of brain tissues in the area of memory function, and then organic lesions will occur, which will eventually lead to memory loss. 4. Psychogenic amnesia: strong mental trauma can lead to transient and temporary amnesia, which is mostly selective and fragmentary. If you have symptoms of memory loss, it is recommended that you seek medical attention as soon as possible and standardize your treatment under the guidance of a professional physician.