Urticaria, commonly known as wheal, is a common skin disease. It is caused by various sensitizing factors, such as temporary inflammation, congestion and a large amount of fluid oozing out of the skin mucosa, resulting in local edematous damage. Patches of red lumps suddenly appear on local or systemic skin, and the onset is rapid and easy to subside, but it is easy to recur and have severe itching.
If you have urticaria, you should try to find out the cause. If you inhale pollen or animal dander, feathers, dust, etc., you must avoid contact with allergens to prevent recurrence.