bacterial infection
"I had an abscess on my upper gum resulting from terrible dentist work. I had also been prescribed amoxicillin 500mg, however after a week of taking amoxicillin the pain/swelling did not go away it got noticeably worse. However after taking my first full dose of Keflex swelling reduced and gradually faded out by the time my dosage was complete. Would highly recommend Keflex."