temperature decreases characteristic symptoms occur such as shivering and mental confusion . Hypothermia is the opposite of hyperthermia which is present in heat exhaustion and heat stroke . Contents 1 Classification 2 Signs and symptoms 2.1 Mild 2.2 Moderate 2.3 Severe 2.4 Skin conditions 2.5 Paradoxical undressing 2.6 Terminal burrowing 3 Causes