A craniotomy is a surgical procedure that involves removing a portion of the skull to access the brain. This operation is typically performed to treat conditions such as brain tumors, traumatic brain injuries, or to relieve pressure caused by swelling. After the necessary treatment, the removed section of the skull is usually replaced and secured. During a craniotomy, patients are placed under general anesthesia to ensure they are unconscious and pain-free. The procedure is performed by a neurosurgeon, who uses specialized tools to carefully open the skull. Recovery may involve monitoring in a hospital setting to manage any potential complications.