Kyphosis is a severe rounding of the back, most commonly found in older women. Mild kyphosis can cause few problems, although severe kyphosis can cause pain and disfiguration. It can occur as a result of a variety of modalities, such as fractures, disc degenerations, birth defects, cancer, and more. It may also cause limited mobility, breathing, and digestive problems. Consult a physician if you notice any difference in appearance of your back.