Urticaria is a common allergic skin disease in children. It is often recurrent and itchy. I believe many parents have heard of it and know about it, and some parents have had similar experiences themselves. The sudden appearance of large, itchy bumps on the child’s body, all over the body just now, but then they disappear, often causing fear and concern among parents. The skin manifestations of hives come and go very quickly. Itchy skin often appears first, followed by erythema or red bumps (bright red or pale, edematous red spots). The erythema and the flushes last for a few minutes or hours (not more than 24 hours) and then usually fade on their own, leaving no trace after fading. They can occur on all parts of the body and are often recurrent and recurring. If the mucous membrane of the digestive tract is involved, symptoms such as nausea, vomiting, abdominal pain and diarrhea may also occur. If the mucous membrane of the respiratory tract is involved, bronchial and pharyngeal symptoms such as chest tightness, discomfort, throat congestion or difficulty in breathing may also occur. If the rash is widespread and leads to a shortage of effective circulating blood, systemic symptoms such as pallor, accelerated heart rate, weak pulse and decreased blood pressure may also occur. If these symptoms are accompanied by the above, visit a hospital at any time, and in severe cases, hospitalization is required. Urticaria caused by acute infection is more common in children than adults and can be accompanied by high fever and increased white blood cells, also known as infective urticaria. Most urticaria requires oral anti-allergy medication. Patients should pay attention to the history of medication taken before the onset of the disease, mental, infection, diet and other factors, which may be related to the onset of the disease should be avoided as much as possible. It is important to have a routine during the illness to adapt to changes in the external environment. Try to stay away from the allergic environment, pay attention to keep the indoor and outdoor cleanliness and hygiene, avoid inhaling pollen, dust, fungal spores, formaldehyde, pyrethrum and other inhalants, etc. Avoid keeping pets such as cats and dogs at home. Do not eat allergenic foods (including all seafood, tobacco, alcohol, spicy foods, mushrooms, mushrooms, fungus such as mushrooms, mushrooms, fungus, fruits such as cantaloupe, pineapple and mango, and in severe cases, avoid beef and mutton), and even food additives such as coloring, condiments, and preservatives in food may also be allergens. Rubber gloves, hair dyes, fragranced soaps and detergents, chemical fiber and woolen clothing, etc. can all be bad stimuli for hives patients and should be avoided. Heat, emotional excitement, exertion, etc. can aggravate skin vasodilation and stimulate or aggravate urticaria, so avoid overheating and sweating stimulation, bathing water should be cool. People suffering from cold urticaria should not go to seawater baths, nor should they take cold baths, and they should pay attention to keeping warm in winter or when they go out. It is recommended that the onset of urticaria should not be treated on its own, and that patients should try to go to the hospital. Patients should take their medication on time and not stop it on their own. Most acute urticaria can subside after standard anti-allergy treatment. However, there are some children who have recurrent hives for more than 6 weeks, called chronic urticaria. Chronic urticaria is easy to diagnose, but the cause is very difficult to define. The causes can be divided into exogenous and endogenous. Exogenous factors are mostly temporary and commonly include food, food additives, drugs, physical stimuli, implants and exercise; endogenous factors are mostly persistent and commonly include infections, systemic diseases, inhalants, high sensitivity of mast cells to IgE, exertion, mental stress, mood swings and endocrine changes. Urticaria is both an independent disease and may be a skin manifestation of certain diseases. There are many diseases that can cause urticaria, such as infectious diseases: parasitic infections like intestinal roundworms, pinworms, etc.; bacterial infections like dental caries, tonsillitis, otitis media, sinusitis, etc.; viral infections like hepatitis B; fungal infections like tinea cruris, etc. In addition, diabetes, hyperthyroidism, menstrual disorders, and even potential tumors in the body can cause hives. Patients with urticaria need to be treated with oral antihistamines, and in the case of chronic urticaria, it often takes 6 to 12 months of treatment before it may heal. To prevent resistance to the same medication over time, it is possible to switch to a different medication. The rash can be controlled by gradually reducing the dosage to the point of discontinuing the drug. In severe urticaria, if it is accompanied by abdominal pain, joint pain and high fever, consider applying hormone therapy for a short period of time, but in general, hormone therapy is not recommended.