What should I do if a baby's bite area swells a lot after being bitten by a mosquito?

Hello, if a large bump appears on your leg after a mosquito bite, you should apply some anti-inflammatory medication locally and closely monitor the progression of the condition. If the condition worsens, it is important to seek timely medical treatment at a hospital, as some mosquitoes may carry certain toxins in their bodies. I hope the above response is helpful to you. Wishing you good health.