You are not the only one. This sort of thing runs on my mom's side of the family, but don't worry - it's not a disease. We have very high arches and this happens when we wear shoes that aren't good for our feet, or if we run around barefoot a lot. My mother has had surgery for unrelated heel spurs, and her problems seem to have subsided. My sister wears $200 custom orthotic (spelling?) inserts in her shoes. I've always been the one to wear tennis shoes most of the time, but have had to start wearing inserts in my shoes. I just go get Dr Scholl's inserts at the store, though. You can get the inserts and get shoes with good arch support to help you some. When the pain starts like that, I soak my feet in very warm to hot water and rub them just as you might do to a muscle cramp. This usually helps to loosen up that tendon. My husband also showed me something he learned in martial arts. Either sit indian style, or with one foot in your lap in that manner. Gently push the ball of your feet back to make the tendon tight with one hand, and then pluck it as if it were a guitar string with your other hand. Do this for a few minutes and then do the same to the other foot...
Hope this helps... DRR :> )