Knee pain during adductor stretching

I have a health problem that’s unique to the history of mankind, and beyond the scope of modern medical care. At least that’s how it’s seemed during my entire adult life. Here’s the problem in a nutshell:

• I’m pathologically stiff in the adductors. I can barely lift my leg sideways at a 45 degree angle to the midline.

• No amount of stretching has helped. I have truly tried all stretches I’ve heard or read about, seen or managed to conjure up. There have been occasions where I stretch the adductors for upwards of half an hour per day for months on end.

• Worse still: any adductor stretching gives me knee pain. This is actually pain, not the nice stretchy feeling you get in a muscle when you stretch correctly, and it is actually in the knee, not in any muscle. This pain gets worse over time and also starts to show up in my daily life after a while. At the end of the month-long stretch attempts mentioned earlier, my knees are cracking and hurting at every turn. If I stop stretching, the pain slowly abates.

• No other bodypart seems to have this problem. I have for example gotten more flexible in my hamstrings.

I realized the other day that Reddit is one of the few places where I haven’t asked for advice on how to solve this… So hit it (if you’re ready to probably do an exercise in futility, because you’re statistically unlikely to provide the solution).