Papular urticaria is a type of allergic reaction, which is specifically related to exposure to irritants, or bites from mosquitoes and fleas. The cause of this disease is relatively clear. Generally, the main symptom is the appearance of red wheals on the body with clear boundaries. At the center of the wheal, there may be a puncture point or small blisters. The primary symptom is itchiness, which is often severe. Repeated scratching of the small blisters can lead to rupture and infection. Therefore, it is important to treat this disease as soon as it is discovered, using oral and topical anti-allergy medications, which generally subside within about a week. It is also advisable to avoid keeping small animals at home and to frequently disinfect bedding by exposing it to sunlight. (Medicine should be used under the guidance of a doctor, based on specific circumstances.)