Have Been Told I Have DISH, Any Thing Diet Wise

Have been told I have DISH, any thing diet wise to help. In pain all the time some times more severe than others. I taken Aleve only when I can't take the pain any more. I'm a very active 71 year old female and swim 3 times a week try to walk 4 times aweek at least 2-3 miles and take a ex. class 2x a week. If I exercise to much I'm in pain and if I don't stretch or ex. I'm in pain and so stiff. Not sure taking long term Aleve is healthy. Any other suggestions would be greatly appreciated. Thank you