A brain haemorrhage, also known as cerebral or intracranial haemorrhage, occurs due to the bursting of an artery in the brain, leading to severe bleeding and various types depending on the affected area. Symptoms include sudden severe headaches, numbness, and paralysis, while diagnosis is aided by CT and MRI scans. Treatment involves monitoring, stabilizing critical health parameters, and possibly surgery, with rehabilitation therapy necessary for recovery and prevention focusing on controlling blood pressure and lifestyle changes.