Symptoms
When osteomalacia is in its early stages, you might not have any symptoms, although signs of osteomalacia may be apparent on an X-ray or other diagnostic tests. As osteomalacia progresses, you might develop bone pain and muscle weakness.
The dull, aching pain associated with osteomalacia most commonly affects the lower back, pelvis, hips, legs and ribs. The pain might be worse at night, or when you put pressure on the bones, and are rarely relieved completely by rest.
Decreased muscle tone and leg weakness can cause a waddling gait and make walking slower and more difficult.
Source: http://www.mayoclinic.com