Hi. I developed three red nickel sized itchy welps overnight last night. One on my left forearm and two on my left leg. I had a sleepover last night, the night they developed, and two other people also slept in my bed and neither one of them were affected. My leg looks like it might be getting infected where the welps are.
Hello, Welcome to Chat Doctor. You might be suffering from popular urticaria (insect bite reaction). You need to use a steroid antibiotic combination ointment twice a day till it subsides. Not everybody who gets bitten will develop allergy. That is why your friends didn't get it. You can also take an antihistamine tablet like cetirizine 10 mg once a day for relief from itching sensation.  Hope this helpedTake care