I've been a licensed massage therapist for over 7 years now. I've had clients come in after using the fascia blaster with deep, very painful bruises. I could not work on a client because of how badly she was bruised. She was experiencing sharp pain down her neck, into her arms because of the fascia blaster use. She stated she watched all the videos about how to use it and the bruising was "healing". No it was not healing. She was damaging herself badly. The fascia in the body is a web, it encases everything and will not "release" with force, speed and pressure. It takes time, patience to unblock restricted fascia.
It is my professional recommendation that you see a professional, certified body worker for help with your pain / trouble areas.