The baby has been undergoing rehabilitation treatment, and now the joints on both sides are making creaking sounds. What could be the reason?

Patient's question:

No

Doctor's answer:

A disease caused by vitamin D deficiency, leading to disorders in calcium and phosphorus metabolism within the body, resulting in poor bone calcification. X-ray changes include: blurred calcification bands, widened metaphyseal ends, and margin changes resembling a brush or cup shape. You can take an X-ray.