Coma is associated with body temperature lower than 96 f. thermometers is essential for accurate measurement in this race. It may be due to exposure to severe climate condition or form normal loss of body heat if a poorly clad person lies hapless or unconscious in an unheated room for one or more days especially if he is elderly and thin. Hypothermic coma may occur in the absence of cold if the metabolic rate is depressed by myxoedema or hypopituitarism.