Calluses may be the result of excessive pressure under one of your foot bones. Typically, the foot bone involved is a metatarsal. Normal weight bearing under all the metatarsals is evenly distributed. If there is an imbalance causing excessive pressure under one metatarsal, a callus (dead skin) may develop. This can be quite painful with walking and standing.Treatment includes periodic shaving of the callus, padding and orthotics. Surgery may be necessary if the pain continues.