My PF came and went for a number of years while I was putting in a lot of running on the roads to train for long distance running events. Two years ago I thought I was going to have to give up running and officiating basketball altogether because of the pain. I went to a sports medicine specialist who offered the "silver bullet" (cortizone shot) and gave me a catalog of different appliances to look at. I borrowed a night splint from a friend who swore by it and gave me instructions on how to use it.
It was very uncomfortable to wear all night and many times I would have to take it off before morning. I wore it every night for about three weeks. By the end of the three weeks the pain was gone and I haven't had a recurrence for over a year and a half.
Don't know if it will work for everybody, but it sure did the trick for me. A website I found to get good information is
www.heelspur.com