burning in the right foot from right below the ankle bone along the side toward the big toe. Not constantly, but when flares, it s as if electric shock happened. lasts for several day at a time and then goes away. not swollen, bruised, sensitive to touch, heat helps some. worse when sitting or laying down (at night). can walk and stand. xrays show no arthritis; orthos don t have a clue. does not feel like tendonitis; any help??