The presence of localized swelling of the skin after being bitten by mosquitoes can be treated with glucocorticoid drugs, oral antihistamines and so on. Topical glucocorticoid ointment such as hydrocortisone cream, Dinaid ointment, fluticasone propionate ointment, etc., the effect of which is to alleviate the inflammatory response, and further improve the symptoms of local redness and swelling. When itching is significant, oral antihistamines such as cetirizine and ebastine can be taken. When the disease is serious, small doses of oral glucocorticosteroids such as prednisone can be taken for treatment. If the symptoms of redness and swelling continue to worsen after being bitten by mosquitoes, you should consult a doctor in a timely manner and take medication as prescribed by the doctor. Pay attention to personal hygiene on weekdays and take good anti-mosquito measures.