I had been working as a convenience store manager for over 7 years on my feet for 10 plus hours a day adding up to 80 plus hours a week. I was laid off in February and so not on my feet near as much. Since then I have noticed my leg has been hurting quite a bit. When I step down on my leg in the morning, while I sit in a certain position, lay in a certain position. I also have an area with the same type symptoms on the inside of my left knee. Is this just because of the abuse for so many years or something I should really worry about?