Sharp pain, foot arch, no where else. not worse in am. occurs when running long distances, i have high arches and tight calves?

Tendon pain?: Consider FHL tendonitis as a possibility. Calf stretching and foot intrinsic strengthening, plus softer orthotics may help. A break for 1-3 weeks from long-distance runs may benefit you. Shorter, painless runs on non-consecutive days. Also, flatter surfaces for now. If I can be of future help, then join my care team at www.healthtap.com/dr-clarkeholmes