Foot reconstruction surgery is often a last resort when conservative treatment is ineffective. There are many structural conditions of the foot and ankle that causes complex deformities. These deformities cause pain and difficulty walking. They may also cause calluses and wounds or ulcerations. Deformities may be due to flatfeet, high arch feet, Charcot deformity (collapse of joints of the foot), rheumatoid arthritis deformities, and post-traumatic deformities.