Suggest Treatment For Swelling On Penis

Hi Doctor, I have a large swelling on my penis just underneath the glans, woke up in the middle of a night and was itchy all over, shrugged them off as mosquito bites and went back to sleep, and then saw the swelling and one other bite on my hip in the morning, so I m hoping mosquito, though I m not 100% sure since I had been wearing underpants...