It’s because the numbness is wearing off and your nerves are starting to recover. Make sure to take ibuprofen every 6 hours. It will get better. Rub the area, try to get it used to being touched again.
Be careful taking anything stronger than over the counter pain medication this far out. It’s very addicting. They gave me enough for a month and then I think even 2 more weeks after that and it really messed me up on my first one. That was 14 years ago now so hopefully they don’t do that anymore.
It just takes time. Keep up on meds but it’s gonna take time. You’re recovering from a major surgery