question: chest paini went to the hospital because i had severe chest pain and ive just had a chest infection and they given me a stronger pain killer to relive the pain because i cud not sleep and ive had one yesterday morning but it keeps coming back and i showed them a spot on my knee and he checked it and he said it was a bite but it has become more red and now its going black in the middle the size is the size of ur pupil in the eye