Coma is a state of unconsciousness in which a person is unresponsive and cannot be awakened. It is a medical emergency and can be caused by various factors, such as traumatic brain injury, stroke, drug overdose, infection, or metabolic disorders. Coma is characterized by the absence of voluntary movement, speech, and eye opening. The person may also have abnormal breathing patterns and reflexes. Coma is considered a severe form of altered consciousness and requires immediate medical attention. The prognosis for coma depends on the underlying cause, the severity and duration of the coma, and the individual’s overall health. Some people may recover fully from a coma, while others may have permanent brain damage or disabilities. Treatment of coma focuses on identifying and treating the underlying cause, providing supportive care, and preventing complications, such as infections, pressure sores, and blood clots. Rehabilitation may also be necessary to help individuals recover and regain function after a coma.