Most pediatric rickets are due to vitamin D deficiency, called vitamin D deficiency rickets, which is mostly seen in infants and is common in winter and spring, and gradually heals after the age of 2. Certain other causes can also show rickets, such as: 1. Low blood phosphorus anti-vitamin D rickets: a hereditary disease with active rickets after 2-3 years of age. Blood calcium is normal, blood phosphorus is significantly lower, and general doses of vitamin D therapy are ineffective. 2. Distal tubular acidosis: The patient is short in stature, has metabolic acidosis, polyuria, low blood calcium, low blood phosphorus and low blood potassium. 3. Vitamin D-dependent rickets: It is a hereditary disease, caused by the body’s inability to convert vitamin D into active vitamin D and function, or by the body’s lack of response to active vitamin D. 4. Renal rickets: It is caused by chronic renal dysfunction resulting in impaired calcium and phosphorus metabolism. 5. Hepatic rickets: caused by liver disorders that impair vitamin D absorption or active vitamin D production. In summary, there are various causes of pediatric rickets, which should be analyzed specifically. If your child is still having rickets activity at the age of 5, you are recommended to take your child to the pediatric department of the hospital for detailed examination to clarify the cause and then treatment.