Have several peas sized soft lumps under my left and right arm, not in the arm pit or around the breast but actually in the under part of my upper arm. Not painful a couple tender to the touch but not painful. What should I be aware of and watch for? An I drinking to much caffeine possibly?  Or could I be having issues from donating plasma two times a week for the last 2 months?Thank you!
Hello and welcome to Chat Doctor, Lumps under left and right arm could be due to soft tissue swellings probably neoplasms. The lesions could be due to neoplastic growth of soft tissue like adipose tissue, smooth muscles, skeletal muscle, blood vessel, lymph channels, etc. Lymph nodes can also be present at this site, however, the swellings are soft. Thus, possibility of lymph node is less. An aspiration cytology of the swelling needs to be done. In this investigation, cells are aspirated using a thin needle. The aspirated cells are spread on glass slide, stained with appropriate stains. On studying the cells under the microscope, the origin and nature of the lesion is determined. Further management will be decided after the test results. Thanks and take care Chat Doctor.