How many days a brain stem hemorrhage of 15 ml can last is different for everyone and depends on various factors to be considered such as the patient’s age and the presence of complications. 1. Age: If the patient is younger, he or she may be able to survive the 1-2 weeks of danger and recover slowly. If the patient is older, it may be difficult to survive the danger period. 2. Presence of complications: If the patient has complications, such as severe lung infection, cardiac arrest, upper gastrointestinal hemorrhage, and so on. In this case, the patient is likely to die quickly. If the patient does not have serious complications, he or she may be able to get through the dangerous period and the bleeding is gradually absorbed. With aggressive treatment, life may be saved. Brain stem hemorrhage is one of the most dangerous conditions of cerebrovascular disease and has a very high mortality rate. Overall brain stem hemorrhage mortality is directly related to the amount of bleeding.