A coma could be a state of prolonged unconsciousness that may be caused by a spread of issues — traumatic head injury, stroke, tumor, drug or alcohol intoxication, or even an underlying health problem, like diabetes or an infection.
A coma is a medical emergency. Swift action is required to preserve life and brain perform. Doctors usually order battery of blood tests and a brain CT scan to undertake to see what is inflicting the coma so correct treatment will begin.