<s>[INST] I recently started a new job that is very physical and ive noticed a very tender, sort of lump IN my belly button... there is no discoloration, no swelling, just tender to the touch and if I were to bend. If you were to put a finger in your belly button and pinch the top of it with your fingers, thats where its located. Any clue what it could be? [/INST] Welcome to Chat Doctor. 1. The possible cause could be inflammation in the umbilical region and next possible cause will be small anterior abdominal wall defect - umbilical hernia.2. In any case I would recommend to at an ultrasound examination done.3. Ultrasiund will help to find any inflammatory changes in subcutaneous plane, any collection, and presence of any defection in the anterior abdominal wall.4.depending on finding in case of inflammatory changes an antibiotic course will be enough.5. In case of hernia / defect you may need to control weight-bearing job, if larger needs correction. 6. Suggest get evaluated before it gets complicated. Good luck. Hope I have answered your query.Anything to ask do not hesitatehttp://doctor. ChatDoctor .com/doctors/ Chat Doctor.  </s>