2-year-old baby was mosquito bites swollen very large can use soap and water rinse, if long time does not subside should promptly seek medical treatment. 2-year-old baby was mosquito bites swollen, mostly because of mosquito toxins appear allergic to the performance of the bite can first use soap and water on the local skin rinse, because soap and water is alkaline, and mosquito toxins are acidic, play a role in neutralizing the toxicity. If the swelling of the bite does not subside, you can use a weak to medium-acting hormone ointment (such as hydrocortisone butyrate ointment) to apply externally under the guidance of a doctor. In addition, it can also be treated with antihistamines under the guidance of a doctor, such as loratadine syrup, cetirizine drops and other drugs. After being bitten by mosquitoes, you should always pay attention to keep the skin clean and avoid scratching to avoid breakage and infection. 2-year-old baby was mosquito bites swollen big continued not subside to seek medical attention in time, under the guidance of the doctor with medication.