Urticaria is a common allergic disease in dermatology, commonly known as rubella lumps, tinea, pellagra, and ghost wind bumps. It is caused by a variety of factors that rapidly cause temporary, congestive, exudative, puffy lesions and plaques on the skin and mucous membranes, accompanied by intense itching. The lesions can occur or fade rapidly, leaving no trace on the skin. In mild cases, the lesions may be accompanied only by itching and wind masses, but in severe cases, they may be accompanied by fever, abdominal pain, diarrhea, laryngeal edema, respiratory distress, hypotension, shock, and other systemic symptoms. Such symptoms should be promptly disposed of at a hospital. The causes of urticaria: its causes are quite complex, we can only find the causes and remove them to better treat urticaria. The first to get hives from the following aspects to find the cause of the trigger: 1, food caused by: any food can cause hives, more is the heterosexual protein, such as seafood (fish, shrimp, crab, dried shells, snails, etc.), milk, eggs, mushrooms, curd, etc. most common. Followed by certain vegetables, spices, such as tomatoes, toon, cilantro, pepper, aromatic leaves, etc.; fruits such as mangoes, strawberries, citrus, poplar berries, peaches, durian and other things that are not often eaten. 2, drugs caused by: there are many drugs are the cause of hives, such as penicillin, sulfonamides, barbiturates, dysentery, analgesic and antipyretic, anti-toxic serum, vaccines, disinfectants, antiseptics and certain herbal medicines, such as smallpox powder, kudzu, fishy grass, dilaudid, hairy wintergreen, through the heart of the lotus, Qianliguang, tendon grass, salvia, safflower, etc., proprietary Chinese medicines such as Liushenwan, Yunnan Baiyao, Yimu cream, antelope antidote pill, niuhuang There are more and more reports of allergies caused by Chinese medicines such as Liushen Pill, Yunnan Baiyao, Yimu Cream, Antelope Antidote Pill, Niuhuang Detoxification Tablet, etc. Drugs used within a month of the rash (including vitamins and health care products) may be the cause and are being investigated. 3, microbial infections caused by: including bacteria, viruses, fungi, parasites (roundworms, pinworms) and other pathogens, decomposition products, secreted toxins, and even destruction of diseased tissue may be allergens. 4, contact with animals, plants, inhalants caused by: animal fur, secretions, plant leaves, juice, floating substances in the air: such as pollen, feathers, dander, fungal spores, mites, dust, etc., may be the allergens of individuals. 5, physical and chemical factors caused by: cold, heat, sunlight, mechanical friction, pressure and certain chemicals such as perfume, detergents and other contact with the skin can also be the cause of urticaria. 6, somatic diseases caused by: there are internal lesions, such as cholecystitis, cholelithiasis, orchitis, sinusitis, tonsillitis, teeth, etc. and lymphoma, visceral tumors, collagen disease, rheumatic fever, etc. can also be the cause of urticaria. 7, mental factors and endocrine changes caused by: in mental tension and anxiety, menstruation, ^ menstruation, pregnancy, hyperthyroidism can occur in the state of urticaria. 8, genetic factors are familial angioneurotic edema, familial cold urticaria. Although there are those triggers mentioned above, 3/4 of the patients with chronic urticaria are unable to find the cause. There are also some laboratory tests available, which are not very precise and only provide a reference for screening. Treatment of urticaria: The first step in the treatment of urticaria is to look for the above-mentioned possible triggers, which requires meticulousness and patience, checking one by one and recalling what you have been exposed to. If you find something suspicious, you should verify it repeatedly and avoid and remove it once you are sure. It is important to take antihistamines or use other anti-allergy treatments at the same time during the rash period. The most effective way to treat urticaria is to identify the cause and remove it, and you are completely cured. Next is anti-allergy treatment: antihistamines are often preferred. There are many types of them, some with drowsiness, some without or mild, depending on each person’s condition, work, life situation selection. For drivers and people who work at height, use those without drowsiness, and for heavy itching and poor sleep, use those with sedative effects. For acute urticaria light can be injected benadryl or promethazine, while oral loratadine, cetirizine, cycloheximide, uazine, paracetamol, etc. can be maintained. If there is laryngeal edema and respiratory distress, immediately administer oxygen and prepare for tracheotomy. With a history of anaphylaxis, immediately inject 0.1% noradrenaline and intravenous hydrocortisone, along with antihistamines. Do not stop the medication immediately after the rash subsides, but also take more medication for a few days, and gradually reduce the amount to prevent recurrence. For chronic urticaria focus on finding the cause, find the cause of symptomatic treatment, but also to avoid recurrence of the key. The treatment routine is oral antihistamines, one drug can not control, can be used in combination with two or three, and can even be combined with corticosteroids. There is a triple therapy of antihistamines + blood pressure + blood loss, which has achieved satisfactory results.