Yes, I have a redundant and torturous colon and my external anal sphincter doesn't relax properly. I am a female that had two vaginal deliveries with a rectocele that I don't think is the main problem
I spent weeks at the Mayo Clinic in Rochester with 22,000 usd in billing for tests at the beginning of 2024. My bp was high from the medication Linzess, I figured this out on my own and discontinued the medication. While I was there they did many cardiac tests and that wasn't what I was there for. I went there hoping to get physical therapy for dysergenic defecation which shows online the main place for this... leading me to go there. I was hugely disappointed with my visit there because I went hoping to get into that specific program to help me. The Drs. there both mentioned they thought I would be in the two week treatment for dysergenic defecation. Their PT person declined to help me so I went home an absolute mess. My husband and I both were shocked that the PT person seemed to have the last call on the decision to help and not the Drs. Where I live there is no PT with EMG and they knew this... they told me to go try that. I do not live in the USA. (I am back at home suffering, my problems are so bad I don't hardly even sleep due to the pressure I start feeling in my body.). Mainly, at the end the Dr mentioned I could have my entire large intestines taken out and be put on a bag. Otherwise, their comments were to do enemas and I haven't been doing those. I am taking magnesium, stool softeners 4 a day, Tryphala and senna too on occasion. This whole visit there was very distressing due to thinking I would have liked to make sure the therapy didn't work first before a drastic option to be put out there.
When I left they continued to schedule appointments that I canceled... for more tests.
Needless to say I was EXTREMELY disappointed and unimpressed with how that experience went.
If I were you I would check out Cleveland Clinic instead...

I am very sorry your son is having problems and I hope you can find the right answer to his problems.