<s>[INST] My 18 year old son was diagnosed with a staph infection on his arm...it looked like a boil to me.  It was lanced and then he was put on oral antibiotics and a topical antibiotic.  It never really went away and 2 other spots popped up.  He was put on another - stronger antibiotic.  A week passed.  It appeared to be gone and then a "mosquito" bite looking circle appeared on the staph site again.  Again he was placed on an antibiotic - Bactrim.  He has been complaining of not feeling well...his face, to me, looks puffy and his eyes somewhat red and feverish ~ although he has no fever.  He continues to be active, but has no appetite.  Any suggestions as to what to do? [/INST] HI, thanks for using Chat Doctor He should be reviewed. There are some star bacteria that may be resistant to the more commonly used antibiotics. He may need a swab of the area to determine if this is the case for him. In addition, blood tests should be done, it is possible since the is now having systemic symptoms (not feeling well, swelling, decreased appetite). Bloods such as a full blood count can be done hope this helps </s>