<s>[INST] I'm 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. I'm not usually like this. No injuries.  I don't work out, just mommy duties. What could be causing this?Sully. [/INST] welcome to Health care magic.1.Most possible cause could be brachial cleft cyst - which is from long time with out 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 collection)4.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. </s>