For about 10 years now (I'm 31), I've dealt with moderate to severe foot pain in both feet (bilateral). I've been through it all... several orthotics, shockwave therapy, cryo nerve block, cortisone shots, Strassburg socks, taping, you name it. What was considered plantar faciaitis could be resolved by the above, but more pain endures. My lower back is perfectly fine and the pain both circles around my heels and at the bottom of my feet behind my toes. I do have a connective tissue disorder called Ehlers Danlos III which may be suspect, but I'm leaning towards a more systemic inflamation like rheumatoid arthritis or even Reiter's Syndrome because I've tested positive for what was called the non-STD version of Chlamidia. But I have no eye problems. I've been diagnosed with a mild case of Reynaud's. There is no stiffness, swelling or redness in my feet and my joints are probably average for a 31 year old body except for painless daily dislocations from EDS.
Doctors don't seem to be able to figure this out. My pain is severe if I'm off my feet, but when I'm standing, I can only take the burning for about 2 minutes. Walking or running is ok, but squatting kills me and I'll regret it for a few days. The pain is pretty consistant throughout the day and it's more burning or pins & needsles than throbbing. I'm not on any medication.