i suffered from pf for a long time before i hit on something that no foot doc ever suggested. they taught me how to tape my foot to reduce the pain during the day, but no one ever suggested taping them at night so my arch was supported while i slept. the idea came to me out of the blue and i figured it probably wouldn't work but decided to try it. all the stretching and injections and insoles couldn't fix the problem but compressing the arch for the 6 to 8 hours every night while i slept did the trick.