Had shin splints a year ago, fully recovered. Went on long walk yesterday, country side & some road, & after 21/2 hours started to get pain under & to the right hand side of my right knee. Pain was worse only when going down hill, no matter how gentle the slope was, it got progressively worse, walked for another 2 hours & have rested as much as possible since. Fine walking up & down stairs, on flat & up hill, still got pain going down hill...could the shin splints have returned?