I changed my diet to follow the Four F's Diet which you can see here:

http://www.rsdrx.com/four_f's_diet.htm

Basically the Four F's are: Fish, Fowl, Fresh Fruit, Fresh Veggies

That link also shows you foods to avoid like coffee, caffeine, sugar, etc. This in an older website so it's not the most recent information. If you do a search for things like "inflammation diet" or similar you will probably find more current information.

But this has worked for me. It's only one of many things that I have done to help my RSD but it DOES make a difference. I am not 100% strict and do "cheat" from time to time...but on a regular basis I am pretty good about sticking to the four F's and avoiding the bad stuff. My biggest compromise is that I cannot drink straight water and things without sugar. I cut the pop out of my diet completely though and have switched to juice and vitamin water. Since I don't get sugar from much else that I eat...I think it's a good compromise.

And I can tell when I don't eat right. When I went to AZ to visit my grandma last month we didn't go to the grocery store the first day to get me food so all I had to drink was pop and all the food was processed junk (which used to be all I ate and drank before changing my diet). The next day my RSD was worse...the inflammation was worse...and I felt sort of like garbage. Once I got some veggies, something other than pop to drink, and stuff for dinner (I made a nice meal for my grandma...she was so impressed that I know how to COOK now...lol) I felt a lot better the next few days. This is just one example...but any time I have strayed from the plan more than just one thing here or there every couple weeks I can tell very quickly.

Good luck. It's not easy to change the way you eat but I definitely think it's worth it.