do you know why during benzodiazepine withdrawal my xiphoid process feels weird and tender? any treatment?

8 weeks off benzodiazepine. Stomach has been messed up lots of weight from not being able to eat much. I was overweight and still am a bit. Digestiin is slowly getting back to normal from constipation. Any idea why the xiphoid process may become tender from withdrawal? Could it be stress? Thanks