hello I have a lump or swelling that popped up out of nowhere and is at the base of what appears to be the clavical head or sternal head on my right side.  It does not hurt and only noticed it when I rubbed my neck last night.  Is this something to be concerned with?
Hello! Thank you for the query. In such location a lump can be a lymph node. If it is a small and single lump, and you are thin person, most likely this is regular lymph node. However, if this is large lump, or it is slowly growing, can be enlarged lymph node. In such case might need some diagnostics. Please consult your doctor with this issue. Hope this will help. Regards.