Hi...if the pain is due to vitamins deficiency you will get symptomatic relief after few weeks of treatment... Till then take over the counter pain medications....Some of the most common reasons for knee pain are sprained ligaments, meniscus (cartilage) tears, tendonitis, and runner's knee...some other causes include bursitis,osteoarthritis, patellofemoral pain syndrome etc...Consult nearest orthopedic surgeon they will do the needful... Regards..

The deficiency of vitamin D and B12 is quite common. The treatment for the same should continue. But at this age you must get yourself thoroughly checked up especially for diabetes and high blood pressure and any other ailment. Other general measures like adequate rest, nutritious diet and regular exercise, keeping yourself tension free are equally important.