Your doctor has probably ruled this out but have they checked you for Shingles? I do not know if Shingles causes joint paint but it can cause rash, fever, and pain. I expect they've checked you for this but just in case ...
Did ur doctors check to see if there were any parasites like the ones that can live inside u sometimes they cause a whole range of issues making it hard to pinpoint but mimicking other diseases
Hi
Welcome to the MedHelp forum!
Well, joint pains, nerve pain and 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 and neural pain. Hashimotos Thyroiditis is another possibility. Hayfever and rheumatoid arthritis too should also be ruled out.
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.
It is difficult to comment beyond this at this stage. So please discuss with your doctor.
Hope this helps. Please let me know if there is any thing else and do keep me posted. Take care!
have you had your kidney functions checked? and your thyroid levels? also a CT scan or MRI might be a good tool to help diagnose the problem.