If a brain tumor patient dies, is it a painful experience? The main reason for the death of brain tumor patients is the increase of intracranial pressure caused by the tumor, and in serious cases, brain herniation will occur in the end, which will compress the respiratory and circulatory centers, and the patient will die of respiratory and cardiac arrest. In this process, when the brain tumor develops to a large size, the patient will have very serious brain edema. This brain edema will cause very severe headache, and in later stage, the effect of dehydration before death is often not good, and the continuous headache will seriously affect the patient’s quality of life, so it will be more painful. A small percentage of patients may not cause serious pain, some patients may have bleeding from brain tumor, which is called tumor stroke, these conditions may induce sudden death, this is not much pain, because it is a sudden situation, died from bleeding. The vast majority of patients, as previously mentioned, may suffer more due to severe cerebral edema, which causes severe headaches.