Had it, but thankfully not too serious a case.
My technique for curing it involved changing shoes for a better fit, rest, stretching my calves, and wearing Crocs around until I could exercise my feet.
The big difference with what I did and orthodox advice is after the pain was mostly gone, I went barefoot as much as possible. I found that supportive shoes, much like a cast, weaken your feet and help contribute to PF by lifting the heel which doesn't allow full flexibility of the calve muscle. I've had no problems since. YMMV.