Can vitamin D deficiency cause rickets?

Growing bones need vitamin D, calcium, and phosphate to harden properly. When mineralisation is impaired, bones can become softer and change shape under normal movement. A child may have delayed growth, bone or muscle discomfort, weakness, bowed legs, thickened wrists or ankles, or changes in the teeth. Rickets is not diagnosed from appearance alone. Other nutritional, inherited, kidney, liver, or absorption problems can produce similar findings, so a clinician may combine an examination with blood tests and imaging.

Arrange a paediatric or family-doctor assessment if a child has persistent limb pain, unusual walking, delayed motor skills, poor growth, or a visible change in bone shape. Share the child’s diet, feeding history, medicines, supplement use, and time spent outdoors. Treatment may involve prescribed vitamin D and mineral support, with the plan adjusted to the child’s age, result, and underlying cause. Avoid adult products or unplanned high doses. Keep follow-up appointments so growth, symptoms, and blood results can be checked.

Seek urgent care if a child has severe pain after a minor injury, cannot walk or use a limb, has a seizure, or seems unusually drowsy or unwell. Prompt review is also appropriate for repeated fractures, worsening weakness, or breathing problems. Do not wait for a bone deformity before discussing concerns; early assessment can identify the cause and protect developing bones.

Ask which tests are needed, whether calcium or phosphate is affected, how treatment will be monitored, and whether siblings or other family members need advice.