Frostbite is initially diagnosed based on symptoms and a physical exam.
Various imaging techniques may be used to determine the severity of tissue damage three to five days after re-warming.
After one to three weeks, imaging may also be used to help evaluate the condition of any potentially damaged blood vessels and to identify severely frostbitten areas that may need to be amputated.
Increased body temperature (104 degrees to 106 degrees F)
Confusion, delirium, or loss of consciousness
Heat stroke can occur suddenly, without any symptoms of heat exhaustion. If a person is experiencing symptoms of heat exhaustion or heat stroke, GET MEDICAL CARE IMMEDIATELY. Any delay could be fatal. Seek emergency medical care for anyone who has been in the heat and who has the following symptoms:
Confusion, anxiety, or loss of consciousness
Very rapid or dramatically slowed heartbeat
Rapid rise in body temperature that reaches 104 degrees to 106 degrees F
Either drenching sweats accompanied by cold, clammy skin (which may indicate heat exhaustion) or a marked decrease in sweating accompanied by hot, flushed, dry skin (which may indicate heat stroke)
Any other heat-related symptom that is not alleviated by moving to a shady or air-conditioned area and administering fluids and salts