Papular urticaria, also known as insect bite dermatitis, patients generally manifested as a windy pimple, pimple, itchy skin, etc., and in severe cases, there may be vesicles, redness, swelling and pain manifestations. Papular urticaria is due to fleas, lice and other insects bite, the saliva in their mouthparts into the human skin caused by skin allergic reactions, so the patient has scattered or aggregated distribution of such as the wind ball-like papules, often with small blisters at the top, accompanied by obvious itching of the skin, and in severe cases, it will affect the patient’s sleep. If patients scratch excessively due to itchy skin, it is possible to scratch the skin, causing epidermal erosion or redness, swelling, pain and other secondary infections. For patients with pimples on the skin, the symptoms are serious or persistently unrelieved, it is recommended that they go to a regular hospital for consultation, to clarify the cause of the disease, and then under the guidance of the doctor to actively treat.