Treating later often involves surgery. No that is osteoporosis, a general term for a progressive loss in the mineral content of your bones. This means that bones become lighter and more fragile. It is known to be common in post-menopausal women but has started turning up more frequently in people taking protease inhibitors. Detecting the condition early could mean better treatment.
Some clinics now offer bone scans.
The cause of bone mineral loss is unclear. For the time being the most sensible advice is to make sure you get enough calcium in your diet. Calcium is found particularly in dairy products, tofu, crunchy green veg like kale and broccoli, and tinned fish with bones in like salmon and sardines.