Post Liver Transplant Medication

My mom had a liver transplant just a little over 3 months ago. She came home a month ago. After her transplant and once she was off all her pain meds she would complain that the sides of her legs hurt, but we didn’t think much of it because obviously she just went through a whole lot and we thought pain and soreness would be part of the process. It has gotten worse and she’s developed what she says feels like “little balls of nerves” they hurt to the touch and some days she really doesn’t want to do anything due to the pain. One of her doctors here in our town(not mayo clinic) said it could be a reaction to her anti-rejection meds. Has anyone ever dealt with or heard of this? Any information you might have would be extremely helpful. Thanks!