Not so sure that Hypothermia is classified as an illness, One would thing it to be classified as a condition. A condition due to the ambient temperature one's surrounded by being below their body temperature. Causing the bodies blood to concentrate in body core. Since the blood is not flowing through the body system as normal several things start to occur in the body. Blood leaves the extremities, the brain, and the epidermal layer. This creates the feeling of cold and starts to precipitate non-cogniscent states in the brain, causing loss of conscientiousness in some persons and irrational thoughts, like removing articles of clothing because one feels warm, or just laying down and shivering in others. This can be a very dangerous for one that finds themselves in this state. Some people simply choose to lie down because they feel too tired to fight the urge to lie down. This condition can be easily reversed with plenty of warm fluids, warmer surroundings and a stable environment, but it takes awhile.
