Hi ~
What type of arthritis have you been diagnosed with? This will make a huge difference in the types of treatments that will be most useful to you. If you have been diagnosed with rheumatoid arthritis, it is very important that - in addition to any changes you may try in your diet - that you be under the care of a qualified rheumatologist who can help you find a treatment to prevent long-term and permanent joint damage. Luckily there are lots of good treatment options, and though it may take some time to find the one that's right for you these treatments can help hugely with pain! So please make sure you discuss these options with your rheumatologist.
Unfortunately there is no scientific evidence that shows that any particular type of diet will necessarily improve the symptoms of rheumatoid arthritis. However, there's lots of anecdotal evidence that diet changes can help patients control their symptoms. Personally I tried a gluten-free diet for six full months without any improvement of my RA symptoms, but I do know others who have claimed a benefit from this type of diet.
Hang in there and remember that we are here to support you! Best of luck!
~Mariah~ (Site Moderator)