<s>[INST] Hi there- I have two lumps under my armpit.  In addition, I have a burning sensation under my arm as well as pain going up my neck and down my arm.  Since I have lyme disease I usually attribute most pain to that, but this has me worried.  I have had two doctors feel the lumps, but neither of them seemed concerned.  One doc said it was a pulled muscle, and the other said that it was most likely fatty tissue.  Should I be more persistent about this? [/INST] Hi, Dear,Thanks for the query to my Chat Doctor clinic. I studied your query in depth. In my opinion-this is bacterial infection by the lymes' disease organism-causing borelliosis. I would advise antibody tests/ and biopsy of the lumps- forelimbs disease to resolve the confusion in its causative factor. I would advise you as above and start the treatment with antibiotics which would regress the lumps. Hope you have cleared your worry. Would welcome you to Chat Doctor for any more queries on it or on other health-problem. </s>