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How do you recognize urticaria?

With the development of society and the advancement of science, people's food hygiene has become more and more important in life. But all kinds of strange diseases have followed. Due to various pollution discharges, people's respiratory system and skin surface
Febrile urticaria, acute onset, genital warfare, with fever, headache, abdominal pain, diarrhea and other gastrointestinal symptoms. Often caused by bacteria or their toxins, more common in upper respiratory tract infections, acute mastitis or
Cold urticaria, with familial and acquired cold urticaria. After being stimulated by cold wind and cold water, it is stinging and itching in the cold part, and then skin edema and wheal appear. It is relieved after warming. Familial cold
Peptone urticaria is caused by the absorption of peptone in food without being completely digested. It occurs mostly in overeating (mainly protein food) and has emotional and heavy drinking. In addition to skin erythema and wheal,
The last one is usually neglected, that is, skin scratches. After the patient is subjected to weak mechanical stimulation, the local wheal appears immediately, which is caused by the physiological reaction. It is often complicated with other types of urticaria.