<s>[INST] I have a lump on the left side of my shoulder a little near my neck inside the collarbone. When it first happened 3 days ago my collarbone and my neck hurt...I wonder where it comes from and there is not any more real pain but I take ibuprofen....What should I do??? It seems like it will go away but I don t know. [/INST] Hi ! Good afternoon. I am Chat Doctor answering your query. From your history, I feel that possibly you have got a lymph node inflamed in your neck region, which could be due to any infection in the Chat Doctor.  If I were your doctor, I would do a general physical examination of yours with special attention to your head and neck region along with the oral cavity, and would consider advising you for a short course of broad spectrum antibiotic along with an anti-inflammatory  </s>