Plantar fasciitis has to be one of the most frustrating diagnoses in all of sports medicine, because the standard advice — stretch the calf, roll a golf ball under your foot, maybe try orthotics — genuinely does help. For a little while. Then it flares right back up the moment you increase your mileage, switch shoes, or just have a long day on your feet. If that cycle sounds familiar, here's why: plantar fasciitis usually isn't a single-structure problem, and it's almost neve