Osteoporosis (porous bone) is a disease in which bones become weak and are more likely to break (fracture). Without prevention or treatment, osteoporosis can progress without pain or symptoms until a fracture occurs. Fractures from osteoporosis commonly occur in the hip, spine, and wrist. Osteoporosis is not just an "old woman's disease." Although it is more common in white or Asian women older than 50 years of age, osteoporosis can occur in almost any person at any age. Osteoporosis is more or less preventable for most people. Prevention is very important because, while treatments are available for osteoporosis, no cure currently exists.