Brain cancer is a serious condition characterized by the uncontrolled growth of abnormal cells within the brain, forming malignant tumors that can interfere with normal neurological function. Tumors may originate in the brain itself (primary brain cancer) or spread from cancers elsewhere in the body (metastatic brain tumors). Symptoms vary depending on the tumor’s size and location but may include persistent headaches, seizures, nausea, vision or speech problems, balance difficulties, personality changes, or weakness in parts of the body. The exact causes are not fully understood, though genetic factors and prior radiation exposure may increase risk. Diagnosis typically involves imaging studies such as MRI or CT scans and sometimes biopsy, and treatment may include surgery, radiation therapy, chemotherapy, targeted therapy, or a combination of these approaches.