Hi, my friend. Try this: take a hard plastic ball (I use a ball hockey one) and roll it back and forth under your foot. A water bottle that is frozen also helps. That is the best thing. I don't know what caused yours. Mine was a combination of competitive soccer and being on my feet for 12 hour shifts. I stopped soccer. Reduced my hours. Elevated them as much as possible. I no longer have plantar fascitis. Orthopedic insoles/shoes help, but are quite expensive. Some work plans cover them.