Hi, I've had a cortisone steroid injection into my forhead because I had a spot years ago and it left some trauma tissue under my skin( like a bump) on my forehead so I had the injection and obviously you will geta ccertain amount of swelling from the injection it's been 3 days now and it hasn't gone down much! If anything the injected area is slightly raised more than before, Is this normal? Also I HAVE BEEN TAKING erythromycinen for my acne is this ok ?