Kyphosis is a forward rounding of the back. Some rounding is normal, but the term "kyphosis" usually refers to an exaggerated rounding of the back. While kyphosis can occur at any age, it's most common in older women.
Age-related kyphosis often occurs after osteoporosis weakens spinal bones to the point that they crack and compress. Other types of kyphosis are seen in infants or teens due to malformation of the spine or wedging of the spinal bones over time.
Mild kyphosis causes few problems, but severe cases can cause pain and be disfiguring. Treatment for kyphosis depends on your age, the cause of the curvature and its effects.