Urticaria should not be washed with salt water, not only with salt water but also with alcohol and vinegar extracts, not to take hot water to wash, not to rub hard. Patients with urticaria are mostly caused by infection and allergy, and the relevant factors need to be found during treatment, such as infection, which should be treated with antibiotics and controlled by anti-infection. If it is caused by allergy, the allergen should be checked and the cause should be avoided to reduce the frequency of attacks and the chances of recurrence. Hives caused by allergies need to be checked for allergens, and if this is not available, they can be controlled on a wide scale, such as avoiding hairy foods such as beef, mutton, seafood, eggs, milk, etc., and avoiding nutty foods, such as pine nuts and pistachios.