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?
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 Desmond/Retractile 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 cystitis/lymphadenitis. Hope this would resolve your worrisome query. Wellcome again to Chat Doctor. Have a good day.