I didn't have paddles, but yet I had the same sensation at my battery pack site. Part of it was from the scar pain & my dermatologist gave me a kenalog shot into the scar & a topical steroid cream. My PM also gave me a script for a compounded lotion with ketamine.
It still bothers me sometimes, though. Even after almost 5 years. One of the many reasons I encourage people to make sure that their life is completely intolerable & they've tried everything else under creation. That burning feeling will probably get a little better over time & the treatments will help so at least you can get a bit of sleep but it probably won't go away.
hope you find some relief,