L50.2: Urticaria due to cold and heat
In your case, the rash has been triggered by cold or heat.
The symptoms can vary in their severity. Certain areas of the skin usually swell up. These areas are often very itchy and red. The symptoms are similar to those that come from contact with stinging nettles.
The rash usually fades away again after a short time. The rash may keep appearing.
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