Hypothermia. Digital thermometer showing an lowered temperature of 33.8 degrees Celsius. This indicates hypothermia. Hypothermia results from insufficient heating of the body. It causes drowsiness, lowered breathing and heart rate, and may result in unconsciousness and death. Normal body temperature varies between 36-38 degrees Celsius. This thermometer can measure body temperature in the mouth, underarm or rectum, but can only detect hypothermia rectally.