What did you think it might be? I basically woke up a few years ago with haglunds deformity on the heels of both feet (large ugly bump/calcium build up) and have had the vice grip sensation ever since which makes it painful to walk and exercise. I've tried everything from chiropractic lasers, plantar fasciitis treatments and exercises, special braces for sleeping, reflexology, acupuncture and medication. Nothing helps. A surgeon I saw told me to come back when I couldn't walk at all. It's been tough living with the pain although exercise helps a bit, it is hard. My symptoms also get worse at night. If anyone has any ideas, I'd love to hear them. Sounds like we are all in a similar boat so there must be something causing it.