What are the symptoms of brain tumors?

Brain tumors do not cause obvious symptoms in the early stages, and only a small number of patients may experience headaches or a sensation of head pressure. As the disease progresses into the later stages, symptoms become more apparent, including severe headaches and coma. Persistent elevation of intracranial pressure may also lead to dizziness, vision loss, increased blood pressure, and even potentially life-threatening complications such as brain herniation.