MagicMakers Fathers Day Dad Gifts, Shiatsu Neck Massager with Heat for Pain Relief Deep Tissue – Christmas Gift for Women, Men, Mom, Dad, Her, Him– Amazing Back & Shoulder Relief from Daughter or Son

For singular knots, I used a tennis ball jammed onto the end of a swiffer mop handle. Basically, you lay on your back with the flat mop part against the wall and position the ball wherever your knot is. Then you can use the leverage of your legs to push against the ball. This is the only thing I could find to show what I mean, but it works for all types of shoulder/back knots: https://youtu.be/dFWBeJ-V6kw?is=Z8sOonKcAcmf6Y6P For a “back rub” feel, you can get these type of massagers: https://a.co/d/02hvfCBW