Urticaria is an itchy skin disease caused by allergies, immune factors, infections and other factors. 1. Allergy: such as newly renovated houses, pet fur, pollen, etc., but also seafood or spicy food, etc., can lead to body allergies and the formation of skin tingling manifestations. 2. Immune factors: urticaria may be caused by the patient’s own immune imbalance resulting in the reaction of the air masses. Patients can check whether they are suffering from chronic diseases or immune system disorders, which may lead to the manifestation of skin eruptions. 3. Infectious factors: patients can check the blood routine, whether the C-reactive protein is elevated, to rule out the manifestation of skin tingling caused by infection. There may be other reasons for the occurrence of urticaria, it is recommended to go to the hospital in a timely manner to identify the causes and treat the symptoms.