Urticaria is a common allergic disease, mostly caused by allergic food, drugs, etc. A systemic allergic reaction, manifested as scattered or patches of the whole body, accompanied by itching, the disease is characterized by the sudden appearance of the rash, a single rash lasting no more than 24 hours, mostly in a few hours to subside, but the rise and fall, repeatedly recede and then re-emerge, the rash does not leave traces after fading. 1. Is urticaria measles? Measles is a contagious disease caused by measles virus infection, while hives is an allergic reaction disease caused by the entry of allergic substances into the human body, and is not contagious. 2.Symptoms of hives? The most common symptom of urticaria is the sudden appearance of red bumps on the skin, which usually subside within 2-24 hours, but repeatedly occur as new rashes with itching. Some patients may also experience fever, nausea, vomiting, abdominal pain, diarrhea, blood in the stool, a feeling of obstruction in the throat, joint pain, etc. In severe cases, they may experience panic, chest tightness, dizziness, weakness, cold extremities, pallor, difficulty breathing, or even coma, and can be life-threatening. 3, a few patients with urticaria will be accompanied by abdominal pain? Urticaria is a kind of limited edema reaction due to increased vascular permeability of the skin and mucous membranes, which occurs on the skin as edematous erythema, i.e., wind masses, and when it occurs in the gastrointestinal tract, the mucous membrane of the gastrointestinal tract is congested and edematous, resulting in gastrointestinal symptoms such as nausea, vomiting, abdominal pain, diarrhea, and even blood in the stool. 4.Can urticaria be life-threatening? Acute urticaria can be severe with laryngeal edema, bronchospasm, anaphylaxis and other serious illnesses. The disease develops rapidly and is life-threatening if not rescued in time. Therefore, patients with urticaria need to go to the hospital immediately once they have a feeling of throat obstruction, chest tightness, shortness of breath, dizziness, weakness and other symptoms, so as not to delay the rescue time. 5.What are the special types of urticaria? In addition to the common types of urticaria, there are also some special types of urticaria, such as artificial urticaria (skin scarring), delayed pressure urticaria, cold urticaria, cholinergic urticaria, pyogenic urticaria, solar urticaria, sports urticaria, water urticaria, autoimmune urticaria, angioedema, etc. 6.Do I need to check allergens for urticaria? Patients with recurrent urticaria may consider allergen testing, the results of which can prompt patients to avoid contact with certain suspected allergens. However, allergen testing does not reveal what is causing the patient’s current episode. The current allergen screening method can simply be seen as a tolerance test on the subject, but the dose of allergen used for the test is very small, and there are more factors affecting the results, so the test results do not fully reflect the real situation in the patient’s body, and the types of substances detected are limited, and the substances not detected still have the potential to cause hives in patients. 7.How to prevent the reoccurrence of urticaria? To prevent the recurrence of hives, finding allergens is the key, but allergen detection technology is limited. The best way is to get into the habit of keeping a patient diary, recording daily food, medications, substances contacted, and changes in the surrounding environment. Once hives occur, you can look for possible allergens based on the records. If you have an attack after two exposures to the same substance, you are highly suspicious of an allergy to the substance and avoiding re-exposure can reduce recurrence.