Mosquito bites for a year has not yet healed, consider the occurrence of chronic papular urticaria, scarring, inflammatory granuloma, etc.. 1. Chronic papular urticaria: mosquito bites are not treated in time, may cause papular urticaria (insect bite dermatitis), and papular urticaria is not diagnosed and treated in time, the new rash can be successive so that the course of the disease is prolonged for a longer period of time, and is easy to recur, the main manifestation of the skin with a red rash, itching. 2. Keloid: If you have a keloid body, it may cause hard nodules after being bitten by mosquitoes, local pigmentation, and will exist for a long time, not easy to fade. 3. Inflammatory granuloma: After being bitten by mosquitoes, if it causes inflammatory reaction or localized inflammatory edema, if it is not treated in time, it is easy to cause granuloma and localized purulent reaction. If the mosquito bite one year after the symptoms have not disappeared there may be other reasons (such as secondary fungal, pathogenic infections), it is recommended to consult a doctor in a timely manner, under the guidance of the doctor.