Paget's disease of the bone is a chronic disorder that affects the bones and the tissue surrounding them. It is characterized by abnormal bone remodeling which can lead to deformity, fractures, pain, and arthritis. The stages of Paget’s disease of the bone include asymptomatic, pre-osteoblastic, osteoblastic, mixed, and osteolytic. Asymptomatic is when there are no symptoms, pre-osteoblastic is when bone enlargement is present but there is no bone destruction, osteoblastic is when bone destruction and enlargement is present, mixed is when there is a combination of enlargement and destruction, and osteolytic is when there is active bone destruction. Treatment options for Paget’s disease of the bone vary depending on the stage of the disease, but may include medications, physical therapy, surgery, and lifestyle changes.