Swelling caused by mosquito bites is mostly due to allergies and inflammatory reactions, which can be improved by local cold compresses, local medications, oral medications, etc. 1. Local cold compresses: you can use ice or ice packs for cold compresses to help relieve the symptoms of swelling. 2. Topical medication: you can apply glycerine lotion, hydrocortisone butyrate cream, etc., which has the effect of reducing swelling and relieving itching. 3. Oral medication: you can take antihistamines, such as loratadine, cetirizine, etc., with anti-allergic effect, can effectively relieve the swelling and itching symptoms. In severe cases, oral glucocorticoid therapy can be taken in small doses for a short period of time. The above drugs need to be used under the guidance of a doctor.