A good example of this approach was a patient who came to me with left shoulder pain. Naturally, I first assessed and treated the shoulder itself, working with the local structures that could potentially have been responsible for the symptoms. However, despite the local treatment, there was no meaningful improvement in either pain or function.
For me, this lack of response was important information. If I work on a structure that I suspect is contributing to the problem and the patient's symptoms remain unchanged, I do not continue treating the same area simply because that is where the pain is located. Instead, I return to the broader movement pattern and look at how different parts of the body may be contributing to the patient's overall strategy.
In this particular case, the assessment led me away from the painful left shoulder and towards the opposite side of the trunk, specifically the right abdominal region. After manual treatment of this area, I immediately retested the same movement of the left shoulder. This time the response was completely different: the shoulder pain was eliminated.
What makes this case interesting is not simply that treatment in one area was followed by improvement somewhere else. The important point is the sequence of clinical reasoning. Local treatment of the symptomatic shoulder had produced no significant change, while an intervention in a seemingly unrelated area on the opposite side of the body was followed by an immediate change in the original symptom.
Of course, a single clinical observation does not prove that the right abdominal region was the “cause” of the left shoulder pain, nor would I conclude that patients with left shoulder pain should therefore be treated on the right side of the abdomen. That would replace one simplistic model with another. What the response gave me was new clinical information: changing one part of the system had influenced the function of another.
This is where the concept of functional and movement chains becomes particularly interesting. The body does not organise movement as a collection of completely independent muscles and joints. Different regions cooperate during movement, stabilization and load transfer, including across opposite sides of the body. When the contribution of one part of this system changes, the mechanical demands placed on another part may also change.
Cases like this are also a good example of why, in PRT – Pain Relief Technique, assessment and treatment often overlap. The intervention itself becomes part of the assessment. I establish a reproducible symptom or functional test, make a clinical hypothesis, intervene, and then immediately retest. If nothing changes, that result is useful. If the patient's pain, strength, movement or stability changes, that is useful too. In either case, the response helps determine the next step.
For me, the lesson from this patient was therefore not that “left shoulder pain comes from the right abdomen.” The lesson was much more valuable: the painful structure is not always the only structure worth investigating. Sometimes local treatment produces the answer; sometimes the response of the patient leads us further along the movement chain.
And these are often the cases in which another bubble bursts. What initially looked like an isolated shoulder problem begins to reveal a much broader picture of how that individual patient organises movement, distributes load and uses the body as an interconnected system.
The goal is not to search for the most distant possible cause. The goal is to find the intervention that produces a meaningful and reproducible change in the patient's function — and then understand why.