In late spring and early summer, the weather changes a lot, the temperature is high and low, it is the time for germs to breed and reproduce and old diseases to recur, the air is often mixed with various microorganisms, pollen, dust and other allergic factors. There are many people who are harassed by rashes and have unbearable itchy skin, and some uninformed people directly equate rashes with hives attacks. The rash does not necessarily mean that you have hives. 1, not all rashes are caused by hives. The red bumps of varying sizes, which always make people scratch because of the intense itching, are all blamed on hives by some patients who have rashes. This is too one-sided: “It’s not just hives that cause rashes, there are many other diseases that cause rashes, the most common of which are rubella and measles.” Rubella mostly occurs in older children, which is around school age, and is an acute respiratory infection caused by the rubella virus, which is generally spread through airborne droplets. Rubella vaccination is a powerful measure to prevent rubella, and it is best to get vaccinated promptly if someone around you has rubella. Rubella differs from urticaria in that it is usually a fever followed by a rash. Rubella usually has a low fever and a rash of light red, round or oval papules within 1 or 2 days of onset. Measles, on the other hand, is characterized by red papules on the skin and mucous membrane patches on the cheek, accompanied by fever, upper respiratory tract inflammation, conjunctivitis and other complications, and is one of the most common acute viral infections in children. Urticaria, commonly known as “rubella”, is an allergic skin disease. Patients have a painful, itchy rash that appears in patches. The amount and flow of allergens in the air increases significantly in the spring, so it becomes a high incidence of hives. 2, self-testing hives is not complicated to draw circles and observe on OK. In daily life, there are a lot of rashes, some of which are very similar to the symptoms of hives, so is it still possible for patients to identify the rash on their body is the ghost of hives? Self-testing methods for hives not only exist, but are also very simple and easy to follow. If the rash within the circle disappears spontaneously within 24 hours, it is basically determined to be hives. The clinical characteristic of urticaria is the appearance of bright red, light red wind clusters of varying sizes on the skin, which often appear suddenly and then fade rapidly after a few hours, generally not more than 24 hours, leaving no trace after fading. “The characteristics of this rash, which comes and goes, provide a convenient way to identify hives. In addition, hives tend to appear in batches and often fade. “If the rash subsides and then recurs more severely patients should promptly go to the hospital for regular consultation and treatment.”