Tennis balls. I get a lot of shoulder and neck pain and I don’t know how I managed before I discovered tennis balls for working out knots in my upper back. I l

Tennis balls. I get a lot of shoulder and neck pain and I don’t know how I managed before I discovered tennis balls for working out knots in my upper back. I lay on one, and move it around until I find the knots causing muscle strain in my neck. They have just the right firmness to give ratio to really work on tough knots near my shoulder blade that I used to use wall corners to try to work out.