marble in foot??

shelley638

hi i have a funny feeling in my big toe sometimes happens when im walking normally but its mainly when im walking downstairs, when i put pressure on the ball of my right foot it feels like there is something in my foot like a marble that rolls right to the end of my big toe. have had it for a few months and feels fine usually but its soo uncomfortable and painful at the time, has anyone else had this or does anyone know what it is? thanks

shelley