At present, the specific causes and mechanisms of Alzheimer's disease are not very clear, but they are mainly divided into two categories. The first category is hereditary, where some Alzheimer's disease cases have a clear family history and involve some genetic mutations. These genetic mutations lead to the deposition of abnormal proteins within neurons, causing irreversible neuronal death, which is the main reason for familial Alzheimer’s disease. The second category is sporadic Alzheimer’s disease, for which no clear pathogenesis has been identified. Research suggests that factors such as oxidative stress, trauma, cerebrovascular disease, cerebral ischemia, and other factors, including metabolic conditions leading to dementia, are related to the occurrence of sporadic Alzheimer's disease. Therefore, the causes of Alzheimer’s disease include two main categories: the first is caused by genetic mutations, and the second is caused by various adverse factors leading to neuronal death.