Hi and thanks for the query,
Chronic leg pain, especially without any associated fever or trauma deserves a keen evaluation. It was reasonable for the doctor to ask for a Vitamin D screen. Vitamin synthesis actually starts in the skin, but the completion of the process actually occurs in the kidneys. A deficiency in Vitamin D could arise either due to skin, liver or kidney dysfunctions, which are all implicated in its synthesis. However, note that there are patients where low levels of Vitamin D are found with actually intact structures, with no organ deficiency. This could be your case and its described as idiopathic Vitamin D deficiency. Vitamin D helps in calcium reabsorption. Measuring blood levels of Calcium could also be important in your case. A chronic pain as such to me requires exclusion of inflammatory conditions like rheumatologic diseases. I suggest markers of inflammation like the erythrocyte sedimentation rate, and C reactive proteins should be done. With a history of recurrent throat infections, testing and excluding rheumatic heart disease and rheumatoid arthritis could be worth while. I suggest you consult an internist for a proper clinical evaluation and exclusion of chronic inflammatory diseases, electrolyte abnormalities especially Calcium and Magnesium, rheumtologic disorders. The Vitamins you take might help, but actually knowing the exact origin of these symptoms would be an additional gain. I suggest you nook an appointment with the nearest internist. Thanks and best regards, Luchuo, MD.

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