Papular urticaria, also known as insect bite dermatitis, is commonly seen in children and individuals with lower resistance and sensitive skin. It is caused by bites from insects such as mosquitoes and mites. The resulting skin reaction varies from person to person and is characterized by red patches and blisters. According to Traditional Chinese Medicine, it can be categorized into damp-heat type and wind-heat type. The wind-heat type usually occurs on the limbs, while the damp-heat type is more common around the waist and features larger and more numerous blisters. This condition is related to insect bites, commonly from mosquitoes, lice, fleas, mites, bedbugs, etc. After being bitten, the saliva injected into the skin may trigger an allergic reaction in the body.