The Relationship Between Stress and Pain

Moderate stress can appropriately stimulate the sympathetic nervous system and help maintain a balanced state of the autonomic nervous system (for example, there are cases where people with knee pain find that when they take the plunge and go outside, their pain is surprisingly manageable and they are able to walk).
However, excessive stress, fatigue, irritation, and anger can cause the sympathetic nervous system to become overactive, which further exacerbates pain.
Also, I feel that for many people, pain is difficult to see, and they often feel that it is not understood by others.
It is not only stressful for those suffering from chronic pain, but it is also stressful for their families, which can be a factor that degrades the quality of communication. For medical professionals, there are also difficult cases, such as caring for patients whose fibromyalgia is not well-controlled.
There are cases where a clear cause is identified and removing it leads to a smooth recovery—cases that work out through such causal logic (for example, orthopedic surgery)—but from my many years of experience as an acupuncturist, I feel that the overwhelming majority of cases are not like that.
Chronic pain is a chronic condition, distinct from acute pain, and because it involves complex, intertwined causes, the Ministry of Health, Labour and Welfare has indicated that a multidisciplinary approach is necessary. Rather than searching for organic causes, I highly recommend starting with measures to reduce excessive stress, as you realize that stress makes pain worse. Getting enough sleep, praising yourself for working hard despite the pain, and cherishing positive feelings—the mind affects the body, and the body changes based on your state of mind. As the concept of impermanence suggests, situations will always change (not just for the worse, but of course for the better as well). Isn't finding a way to keep yourself in a good mood, even just a little, a much wiser approach than searching for complex causes and treatments?
I am very grateful to those who have read this to the end.