The Ball Of My Foot Were The Fourth Toe Connects

the ball of my foot were the fourth toe connects , right behind that 4th toe of the ball on my foot. if i walk wrong without a thick sole shoe it will make me weak to my knees. Like im crumbling down. if i have atleast an inch and half sole my ball of foot will not bother me. i hope ive explained to were you can get idea of what im going threw. thank you