Q: My 15 years old son has been complaining of mild and non-specific bone pain for the past few years. He underwent a range of tests including complete blood count (CBC) , kidney function , creatine phosphokinase (CPK) , liver function , Erythrocyte Sedimentation Rate (ESR) , calcium, RA etc. and the only abnormality found was below normal levels of Vitamin D3 and Vitamin B12 He is otherwise quite playful with a normal appetite. We have consulted a rheumatologist who told us that he is not suffering from arthritis but an orthopaedician told us that he was suffering from osteochondritis of the knee and it would resolve as he grows up. What causes mild and non-specific bone pain?

A:Non-specific pain in the bones can be due to Vitamin D deficiency, which is quite prevalent in India. You have not mentioned his vitamin D levels, which would be needed to make a clear diagnosis. But, Vitamin D deficiency is unlikely to cause a pain in only one knee.