There’s no high-quality scientific evidence that massage guns, including Theraguns, can actually get rid of knots in muscles. Muscle knots are hard, sensitive areas of muscle that occur when a muscle tightens even when it’s at rest.
It’s essentially a bundle of tense muscle fibers. Using a Theragun on a muscle knot may temporarily relieve pain from a muscle knot, but scientists don’t know yet if massage guns are a good treatment option for actually removing muscle knots.