Swelling after being bitten by mosquitoes is mainly insect bite dermatitis, you can use topical drugs as the main, oral medication as a supplement to the treatment method for treatment. 1. Due to the mosquito bite, the mosquito will be injected into the body with anesthetic properties of proteins, so that the body produces a perverse reaction, resulting in the occurrence of swelling, this situation is also known as insect bite dermatitis, you can use glycerine lotion or zinc oxide ointment in the local swollen parts of the direct application in order to control the symptoms. For patients with severe itching, hormonal drugs such as mometasone furoate and clobetasol propionate can also be used. 2. For oral drugs: you can take cetirizine and other drugs to weaken the body’s internal metamorphosis, so as to achieve the effect of adjuvant therapy. In general, mosquito bites will cause a small bag, if there are no abnormal symptoms, no special treatment. If the symptoms are more serious, it is recommended to consult a doctor if necessary, and the use of medication should be carried out under the guidance of a doctor.