I Recently Had Surgery To Remove A Piece Of Skin

i recently had surgery to remove a piece of skin infected with MRSA,while on Zyvox therapy ,the skin is growing back with the help of HBO sessions. I have some pain at the sight of surgery when I injust the ZYVOX . I also take 80mg of meathadone a day for pain from the first surgery on my spine,bottom 3 disc were replaced with titanium.I was thinking(HOPING) the pain was from the zyvox fighting the mrsa ,it should finish closing the dr says in a few weeks and maybe I will be taken off mrsa next week ,I have been taking it for the last 8 weeks non stop Oh I all so used a wound vac for 6 weeks non stop. it stoped pulling fluid late last week so I am done with that now.well I told you about the fight I WAS THINKING was the cause of the pain I know thats not real .I am scared.My queston is why the pain when I take zyvox,it is on my bace in the spot that is healing.
SINCERLY TYRONE SEEDIG