She thought she had an allergy: what her itching really was hiding will surprise you

the body that releases histamine in response to a trigger — and this substance causes swollen patches, intense itching, and sometimes a feeling of heat on the skin.

What makes urticaria particularly confusing? It can arise for a wide variety of reasons: food, medicine, stress, cold or even heat. It can last just a few days, or settle down for months. It is this unpredictable character that makes it so difficult to identify without medical advice.
Signs that should alert you

Some concrete clues can put you on the track:

– Red and swollen patches that change place on the body – Itching