I have had severe PF for 1 year now. I have tried ultrasound, PT, cortisone injections, taping, stretching, electric stimuli therapy, deep tissue massage, heel cups, better shoes and being in a cast for 4 1/2 months. I haven't tried Glucosomine though. I keep hearing about it so I need to do some research. I'm glad I wasn't going crazy because I hadn't heard anyone else talk about the severe cramping. Good luck.