I have a small lump in my right armpit that is tender/sore and mid back pain on my right side.  This has been on going for 4 to 6 weeks...was told possible bactierial infection(possibly cat scratch fever) and I was given a z-pack last week and the lump is still there. What could this be? Thank you!
Hi, Welcome to Chat Doctor. The small lump in your armpit could be a lymph node swelling due to infection you had. If the swelling is not tender and not increasing in size, and mobile, there is no need for concern. It will reduce within few weeks. But if it is getting painful, increasing in size and becomes hard to touch and immobile, you need to get an FNAC done to rule out any cellular changes in the lymph node. Thanks.