It started out as a small bump almost like an ant bite and now is quite large but is also painful when right arm is lifted higher than the head like when trying to reach for something. When the head is moved it pulls or feels like it is pulling. Have had chest x-ray and blood work...chest x-ray came back normal as did bloodwork...still waiting on one more test to check for cat scratch disease. Any ideas on what this might be? Next step is biopsy probably....