I often help people heal from chronic, psychogenic pain. There are a host of ways to describe this phenomenon: psychogenic pain, psychosomatic pain, TMS, somatic symptom disorder. A common feature among all of the disorders - other than the fact that no organic or structural cause can be found - is that symptoms become worse when life becomes more stressful.
A lot of my training and familiarity with these issues comes from working at the Pain Psychology Center, where I regularly attend trainings and keep up with the latest research on the various ways in which these symptoms manifest. As a result, I have worked successfully with people in reducing and/or eliminating symptoms over every inch of the body, including back pain, neck pain, pelvic pain, stomach issues, migraines, numbness. As I am a sex therapist, I tend to see a lot of clients with pelvic issues, frequent need to urinate, and sexual pain, etc.
The reason why these issues are so frequent and misunderstood has to do in large part to a re-branding by the medical and pharmacological communities in the last 100 years. It's all to common for a doctor these days to issue a "description" of an issue instead of an actual diagnosis. Words and phrases like fibromyalgia, chronic fatigue syndrome, prostatitis, and irritable bowel syndrome - don't actually have any organic diagnostic tests, the way cancer or a broken back does. For thousands of years various cultures have understood the mind-body connection, and the fact that when we get stressed out, our bodies do strange things, no different than getting the butterflies or blushing before going on stage, or a headache when kids are playing loudly.