the only real solution is to stop concentrating pressure on that spot by consciously diverting pressure to other parts of the foot. there are three weight bearing points under the foot. heel, ball of foot on big toe side, and ball of foot on small toe side. balances between left and right and front and back must be well controlled for these points and most of the foot problems arise from some imbalance due to inflexible tendencies of the person in using foot and leg. try to increase flexibility and strength of foot, ankle, and hip rotator muscles for better control on the weight distribution on the foot.