I am suffering too from leg shin pain. A few weeks ago there was discussion on here that I am looking into in regard to fluoroquinolone antibiotics which is the basis of several antibiotics including Levaquin and cipro. I have taken both about five to seven years ago. These antibiotics do have the side affects of tendon and muscle pain even years later. There is a class action suit against the company which I think is Johnson and Johnson. I had never heard of the problem with fluoroquinolone antibiotics before. The gal posting had severe leg pain and several of the replies also had the same problem. You could get a start on your research by doing an AI CoPilot with Microsoft or an AI inquiry with Google Gemini. Or a plain search with Google. So much information out there, that I can't believe I had not heard about it before. I believe my leg pain is my tendons, because I raised the tension on my exercise bicycle. I realized a couple weeks later that might be the problem because my feet do not hurt, just my legs. I had tendonitis 20/25 years ago in my left arm and the pain feels the same. I have just started looking into this and have not discussed it thoroughly with a pain doctor. But, will soon. It seems that regular doctors have not heard of the fluoroqinolone after affects. Maybe there should be a permanent post here on Mayo Connect, because it does seem wide spread.