I have been suffering from sudden knee pain sine last week, that gets severe by evenings. The surrounding muscles around the knees also pain. Also, I feel like my backbone gets stressed and I get tired so quickly. My routine has been working 7 hours a day, traveling every week between Islamabad and Lahore, and sometimes I often skip on diet which could have made me weak over time. But the sudden and heavy pain in the knees is worrying. I am planning to go for CBC and Vitamin test. Please advise me relevant physician to visit and discuss further.