Hi my son is 2 and a half years old he got bitten by something like 4 or 5 days ago walking into the house not sure what kind of bug but it looked like a mosquito bite at first he kept messing with it and itching now it has a small scab and has a red ring around it? What could that mean? Also 5 days ago he woke up from a nap and had 3 bites behind his right ear and 1 on his left cheek then the next day he woke up and had 3 bites behinds the left ear and 2 on his left cheek and 2 on his neck on the back. We stripped his bed and cleaned his mattress . But he had no other bites anywhere else but from his neck and up. Until the bite on his rist that has a red ring around it? Please what could it be that s biting him?