Sudden onset of urticaria, mostly considered to be food or drug allergies, but of course do not rule out the environmental factors. 1. Food allergy: food allergens, including milk, eggs, beef and lamb and other animal proteins, such food can affect the immune system function, easy to cause skin allergies, resulting in the occurrence of urticaria. 2. Drug allergy: clinical studies have shown that when histamine-releasing drugs enter the body, in the form of non-metabolic reactions, triggering allergic urticaria, including quinine, codeine, morphine and other central nervous system depressant drugs, and penicillin in its application in the body will produce metabolic reactions, these allergens in the body to produce IgE antibodies, resulting in the appearance of skin tingling. 3. Environmental factors: If the air contains pollen, dust mites, animal fur, fungal spores and other components, when the patient inhales the air containing allergens, can quickly induce urticaria. Sudden hives may also have other causes, such as cold, heat, sunlight and other physical factors can be induced. It is recommended that patients go to the hospital in a timely manner, under the guidance of the doctor to actively standardize the treatment.
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