Tight shoes and high heels can place extra pressure on the ball of your foot, causing neuromas and calluses. A neuroma is an inflamed nerve. It can cause pain, numbness, or burning. A plantar callus is a buildup of hard skin on the ball of the foot. The callus may feel like a stone in your shoe. There are many nonsurgical treatments for neuromas and calluses, but if these are not helpful, surgery may be considered.