Whether or not anesthesia hurts the brain is probably a concern for most patients and their families. In the anesthesia community, most now believe that general anesthesia is a reversible process, and most drugs are protective of the brain and generally do not damage the brain. However, there are some complications during anesthesia, and if complications occur, the brain nervous system may be injured, such as hypotension during anesthesia, which may cause ischemia and hypoxia in the brain and certain damage. If a cerebral infarction occurs during surgery or during anesthesia, this is a serious brain injury. If hypoxia occurs during anesthesia and the hypoxia lasts for a long time, it can also lead to brain damage.