<s>[INST] I was diagnosed with staphyloccocus hominis v hominis after a stereotactic biopsy back in August. The surgeon had to go back in and remove what he could which left a large hole in my axillae on my right side chest wall in October. We have been changing the dressing regularly since then and it seemed to have slowly been healing but now it has begun causing pain once again. Though the hole is finally getting smaller, I noticed during my shower that white pus is coming from it once again. Does that mean the infection is returning? And will Cephalaxen help? I still have some of those left. [/INST] Hello dear, Thank you for your contact to Chat Doctor. I read and understand your concern. I am Chat Doctor answering your concern. Yes, there is chance that the infection is back with more resistant infection. Many a times bacteria adopt resistant power against the antibiotics given. In such a situation different antibiotics should be chosen as to clear up the infection. I suggest you to do culture and sensitivity from the discharge. The result will likely say that the organisms is resistant to the cephalexin and sensitive to the other antibiotics. I advise you to take those sensitive Chat Doctor. Please do regular  </s>