Brain damage refers to the injury or impairment of brain cells, which can affect cognitive functions, emotions, and physical abilities. This damage can result from various causes, including trauma, stroke, infections, or lack of oxygen. The severity and location of the injury determine the specific effects on an individual. Symptoms of brain damage can vary widely, ranging from memory loss and difficulty concentrating to changes in behavior and motor skills. Rehabilitation and therapy may help individuals recover some functions, but the extent of recovery often depends on the severity of the damage and the promptness of treatment.