Health problems associated with kyphosis of the spine include back pain, stiffness and disfigurement in severe cases, according to Mayo Clinic. Pressure on the spinal cord can weaken the legs and feet, and the curve can impede breathing and heart functioning, explains the University of Maryland Medical Center.
Symptoms may not occur in mild cases of kyphosis, notes Mayo Clinic. The excessively rounded back appears in children and older women most often. When osteoporosis weakens bones in the spine in post-menopausal women so severely that they crack and compress, kyphosis is the result. Infants can develop a type of kyphosis if their spines are malformed. Teenagers may experience wedging of their spinal bones over an extended period, leading to the condition.