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Answer Wiki. Some knots can come out within a couple minutes. Others never come out. I've had extreme back and neck pain for the past year and a half, most of it just tension in my muscles. I've had numerous massages, taken other treatment, all to no avail.
What Causes Muscle Knots In Your Upper Back. A âknotâ is a contraction (shortening) or spasm in a muscle. It is a place where a muscle has become âtightâ for one reason or another. Overwork is the most common cause. That doesnât mean that YOU are working too muchâit means that some of your muscles are.