Tiziana M. 
Osteoporosis 

Osteoporosis is caused when bone mass decreases.  This results in the bones to be more susceptible to fracture. Bone is constantly being broken down and reabsorbed by cells which are osteoclasts, and then rebuilt by other cells called osteoblasts. As you age, more bone is reabsorbed than replaced.One of the first osteoporosis symptoms is back pain.  Many patients ignore this or confuse it with the onset of arthritis.  But, if you are experiencing back pain, ask your doctor whether a bone density scan is warranted.