Coma is a prolong state of unconsciousness in which a person fails to respond to any stimulation including pain; moreover, he can’t wake up , move or feel anything. In this condition, the functioning of a brain is at its lowest stage and it can be mainly caused by severe brain injuries, traumas etc. A person who experiences coma is known as “comatose”. People who remain in coma for a longer period of time need special care and attention. Furthermore, they should be given proper medical treatment and nutrients in order to keep them healthy.