Most often Mild Scoliosis may show no noticeable outward signs or symptoms and can go undiagnosed for years. Many of the signs or symptoms of mild scoliosis will involve subtle postural and body symmetry changes. It can be nearly impossible to tell a person has scoliosis just by looking at them, especially mild scoliosis. While scoliosis appears as a side-to-side curve on an x-ray, it is actually a twisting of the spine that causes the rib cage to rotate as well. The effect becomes visible in some patients when the rib cage is pushed to one side causing a “rib hump.”