Hello @debbie2021, Welcome to Connect. I don't have any experience with stimulator implants but there are a lot of members here that may be able to provide some answers for you through their personal experience. Here are a couple of discussions you may want to read through to learn what has been shared and ask any questions you have.

-- Spinal Cord Stimulation: https://connect.mayoclinic.org/discussion/spinal-cord-stimulation-2/
-- Peripheral nerve stimulators: https://connect.mayoclinic.org/discussion/peripheral-nerve-stimulators/

Are you able to share more about your diagnosis and they type of stimulator implant you have? Also, have you discussed the new symptom of the muscles on the left side of your spine hurting?