have you been tested for celiac disease? a possible wheat gluten intolerance could be causing all the problems. if it is the case you'll have to change your diet which could be a pain but the symptoms will disappear in a matter of weeks. worth getting it looked into. I wish you luck.
Hi
Thanks for writing to the forum!
Well, joint pains with rash can be seen in SLE, psoriatic arthritis, fibromyalgia, polymayalgia rheumatica and chronic fatigue syndrome. Gout, though typically affects the great toe, can cause multiple joint pain with rash. Hashimotos Thyroiditis is another possibility. Hayfever and rheumatoid arthritis too should also be ruled out. It looks like rheumatoid arthritis has been ruled out in your case.
Another possibility is reactive arthritis, which could have occurred in reaction to something—in this case rash. In this case you need to rule out the cause for the hives or urticaria. Urticaria is usually triggered by allergens, such as drugs, foods, insect bites, inhaled substances, in response to sunlight, cold, heat, stress, exercise, or a viral infection. Other common allergens are pollen, mold, dust, pet dander, or cosmetics. Food allergies like to gluten and alcohol too should be looked into.You may need to consult an allergy specialist.
Hope this helps. Do let me know if there is any thing else and keep me posted. Take care!