Here’s an interesting post from chiropractor Steve Noble’s blog about the role of old scar tissue on current pain:
A case of scar tissue release at the knee resulting in decreased shoulder pain
Tuesday this past week I had a patient come in complaining of shoulder pain with cramping occurring to the pectoralis minor. A brief assessment his shoulder indicated some tight muscles but nothing more. I followed up with the question, “have you had any surgeries?” His reply was “yes, 10 years ago on my right knee.” The same side as his shoulder pain.