Will breast abscess stop me from going on my vacation?

You could be: It depend on the situation, if the case diagnose and in the process of treatment and you are responding i think so. Check with your doctor.

Maybe: If you are having fever, aches and chills you should not be travelling but should see your doctor. If you have already been drained with a needle or tiny incision and are feeling well [or nusing and getting better] discuss with your doc but likely you can still go.