<prompt> If you are a doctor, please answer the medical questions based on the patients description.I have had a small, maybe pea to marble sized nodule to the left side of my collar bone at the v in the centrer. It is moveable and has no attachment to the outer skin, nor any drainage. It ormally does not hurt but for a couple of days now it hasbeen achey. What are possible causes?  <response>: Hi, Dear,Good Morning. Thanks for the query to my Chat Doctor online-clinic. I studied your quarry in-depth. In my opinion the movable nodule in supra sternal notch-V-in the center of 2 collar bones, is mostly a Lipoma of Burns space or could be DesmondRetractile thyroiditis or Oncogenic Cyst or hidden oncogenic duct with-fistula or lymph node ? Cause of aches could be ? Excessive handling of nodule causing tissue edema and pain ? Oncogenic cystitislymphadenitis. Hope this would resolve your worrisome query. Wellcome again to Chat Doctor. Have a good day. 