What are the causes of heat urticaria?

Six major causes of heat urticaria: First, bacterial infections, fungal infections, viral infections, parasitic infections and so on can be caused. Second, food causes:Mainly animal protein foods, such as fish, shrimp, crab, eggs, milk and other sea food is a common causative factor. Certain fruits and vegetables can also cause sensitization, adding food seasonings, preservatives, pigments, natural or synthetic substances in food such as salicylic acid, citric acid, etc. can also cause urticaria. Third, drug-induced: most of the drugs are caused by metabolic reactions, common drugs are: penicillin, furazolidone, serum products, vaccines and so on. Its onset has a certain latency period. Aspirin, morphine, atropine, vitamin B1, polymyxin and other drugs itself is a histamine-releasing agent, can directly stimulate mast cells to release histamine and urticaria. Inhalation of animal dander, pollen, fungal spores, dust, feathers and so on. Fifth, nervousness, mood swings, depression, etc. can also become triggering factors for urticaria. Six, some trauma, such as sunburn, burns, mechanical stimulation, etc. are easy to induce vitiligo. Chongqing Dibang Skin Hospital is the only large hospital in southwest China specializing in dermatology, which brings together many famous experts, years of clinical experience is a guarantee of the patient's recovery. The company's products and services have been widely recognized as the best in the world for their quality and reliability, and they have been recognized as the best in the world for their quality and reliability. The company's website has been updated with the latest information about the company's website and its website.