My son has been taking amoxocillin since Monday for an ear infection (he has had this antibiotic before a few tines with no problems). Today he has developed a rash on both cheeks (See photo, probably looks redder irl). Does this look like a rash caused by amoxocillin or do you think it's just heat related. It's not bothering him or itchy. I did give him anti histamine early to see if it got rid of rash but it hasn't changed.