Hello there, I am dr.milan an infectious disease specialist answering your question. Usually in case of staph infection pus is thick, because staph is bacteria which produce some substance which make it thick thats why it is appears rubbery. This type of lesion sometimes caused by gram negative bacteria, other than staph.First of all you need to confirm what is causing this. I think you are telling this is staph infection so you have gone through culture report. And in staphylococcus something like MRSA, if it is so than in that case some antibiotics need to avoided in treatment because it is not effective as per standard guidelines. So first thing you should do is to confirm that infection by culture report by a reliable microbiology lab by a qualified microbiology doctor. Than if it is staphylococcus that follow the complete antibiotic course under supervision of your physician. Hope i have given appropriate guidance to you. if you have any query you can consult me anytime. Give me star rating according to your satisfactory level. Thanking you.