You may already know that muscles are made up of tons of mini-muscles, or muscle fibers. Each muscle fiber has individual potential to grow or to shrink, which is depending on how much it is being used, rested, etc.
For the types of knots, example, when a muscle injury takes place, even in an effort to build strength, a small amount of scar tissue is released into the area. If the injury is small and the scar tissue tries to lay down on a muscle that is moving well, the muscle will pull on the scar tissue and cause it to align with the muscle. Essentially, you are left with a small amount of restriction from the scar tissue, but nothing too substantial. If this is a repetitive cycle over time, the restriction can build and it can become symptomatic, according to Dr. Karam (Raging Fatloss).
He said, if the injury is a bit bigger and the muscle can’t be used in this area, the scar tissue has more time to lay down, and a matrix or web of scar tissue forms. This forms a major restriction in the tissue and can even try to form bone at times, or calcify. This restriction forms immediately, it will continue to build in time if the scar tissue is not ‘broken down’ and absorbed back into your bloodstream that through proper massage and exercise. This is a second type of knot.
Because the scar tissue is suffocating it, so in both cases, the area of the muscle that has the knot does not receive good blood supply, thus, without good blood supply, it’s hard for anything to heal.
The worse thing is that at anytime, when you touch them, you pressure receptors in your scar tissue, and that’s why it causes the pain. Over time, even the need for these pressure receptors goes away, but the pain remains, which will cause you to choose not to make contact with that body part subconsciously, and after all, it causes pain.
Then, what are you supposed to do?
Well, there is only way to get rid of these pesky pressure receptors, which is by putting pressure on them, simultaneously, break up the scar tissue as a muscle shortens and elongates, pulling on the scar tissue and causing it to realign with the muscle fibers.
Because there’s so much blood flow, the restriction goes away and the area heals, you restore your body.