I have a painful lump on my right collar bone right at the end by the sternum and it radiates pain to my arm, shoulder, neck.  I have had this lump for about 4 years now and it is sometimes painful other times not painful but still present.  It is very obvious and can even be seen through my sweaters.  I have had night sweats badly for about 2 years now but was pregnant so just figured it was that.  I have experienced a great deal of unexplained weight loss for over a year now to the point I dropped to 105 lbs (normally around 120).  I figure the lump is probably just muscle nots since I feel it in my neck and shoulder blades but should I be getting it checked it is getting to the point I can barely move my arm.
Hi, dairy have gone through your question. I can understand your concern. You have lump with weight loss and sweating.  It can be enlarged lymph node due to reactive hyperplasia, tuberculosis or lymphoma.  Or it can be some soft tissue tumor like neurofibroma.  You should go for fine needle aspiration cytology or biopsy of that lump. It will give you exact diagnosis. Then you should take treatment accordingly. Hope I have answered your question, if you have doubt then I will be happy to answer. Thanks for using Chat Doctor. Wish you a very good health.