Why does the whole body itch when it is hot in winter?

This situation is the problem of allergies, there are many kinds of allergies, in fact, their skin is more sensitive.

Sometimes you are allergic to certain drugs or food or other things, and some people are even allergic to hot and cold air. You are allergic to cold or heat, but it is not serious.

If it lasts for a long time, you can use anti-allergic drugs. If the symptoms are not serious, can be tolerated and recover quickly, you don't need to take it.

Specific medication reference: Western medicine can be used for antiallergic treatment, such as chlorphenamine maleate (also known as chlorphenamine maleate, 4mg each time, three times a day, with side effects of drowsiness), or cetirizine, loratadine and antiallergic treatment.