Can I wake up from a coma for 3 months? Whether or not you can wake up from a coma for 3 months depends on what type of coma it is. Some patients can wake up after 3 months of coma, while others cannot wake up after 3 months of coma, as described below. Those who can wake up after 3 months of coma are mainly coma caused by craniocerebral trauma and car accident trauma, and it is often reported that patients are still awake after 6 months of coma, which are often caused by craniocerebral trauma, so it is possible to wake up after 3 months of coma. For others, such as ischemic-hypoxic encephalopathy, mainly after cardiac arrest and cardiopulmonary resuscitation, if the coma reaches 3 months, it is usually impossible to wake up, and generally the possibility of this kind of patients to wake up after one month of coma is minimal.