<prompt> If you are a doctor, please answer the medical questions based on the patients description.Im a 23 year old female Mother of 2. I have a swollen lump like area on Right side Collarbone. It is accompanied by a very uncomfortable feeling of tightness and pain. I feel very fatigued. Mood swings. Anxiety. Easily agitated. Head aches. The back of my neck is also feeling similar but more of a stress provoked tightening and swollen, No hard lump. Just softness.My collarbone does not feel like stress. Im not usually like this. No injuries. I dont work out, just mommy duties. What could be causing this?Sully.  <response>: Welcome to Chat Doctor .1. Most possible cause could be brachial cleft cyst - which is from long time without pain.2. Then lymph nodal enlargement with any underlying medical conditions infections inflammations.3. And last infective cause with collection, pain on touch and radiating pain - had recent fever bacterial infection abscess infective cystic collection4. Get an ultrasound lesion lump to find out the nature of the lump, its source and extensions.5. After that a course of antibiotics will help in infective causes, a small incision depending on the condition. Hope it helps you. Wish you a good health. Anything to ask ? Do not hesitate. Thank you. 