I'm a guy, and my feet are flat, my knees are backward, my thumbs are backward, etc. I don't have significant pain, but I've always had "growing pains." Even now, at 38, I still say I'm having growing pains. I've had knee pains that make it hard to walk, but an hour later, I can run without ever feeling the same pain again.
I've sprained both my ankles numerous times. Rignt now, I'm recovering from a severe sprain from October. I should be doing much better than I am right now. Swelling in my ankle was significantly less than what I've seen on other's ankles for a much milder sprain. I guess that's a good thing for me. I try to look on the bright side.
I do get joint pain, but there's nothing significant right now. It seems I do something and don't realize it, and a finger or wrist hurts for a month or 3. I've never really thought about there being a link until recently when the foot doctor said I should be evaluated for Marfan Syndrome. So, here I am, doing my own research.
I had a sister who had all that, and was diagnosed with fibromyalgia at 37. She died when she was 45 of heart failure. This was almost 2 years ago.