Frostbite - caused by freezing of the skin and underlying tissues., Heat stroke - Body core temperature of more than 40 c, Heat rash - skin irritation caused by excessive sweating during hot, humid weather., Dehydration - Loss of fluid from the body , Decompression sickness - Injuries caused by a rapid decrease in pressure, Chilblain - The painful inflammation of small blood vessels in the skin, Raynaud's disease - The smaller arteries that supply blood to the skin become narrow, limiting blood flow to the affected areas.,

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