Can Juvederm Ultra Cause Arthritis?

There is no reported association between Juvederm and arthritis.  In fact, in some cases of degenerative joint disease, surgeons will inject hyaluronic acid into a joint.

I am unaware of any study that links any of the hyaluronic acid products, (juvederm, Restylane), to arthritis. It is most likely that they are unrelated to each other. I would have the arthitis checked out by your doctor.
We have many patients who have arthritis who use the hyaluronic acid products with good results and no flare up of their arthritis. You should make your practitioner aware of any health problems, new or old, so they can effectively evaluate and treat you.

I know of no reports suggesting an association of arthirtic conditions with the injection of hyaluronic acid fillers.

Thanks for your question.
I've never heard of a link between Juvederm and arthritis. Juvederm is hyaluronic acid, a natural component of your collagen found in the second layer of the skin. There is no reason that you should develop arthritis from any cosmetic injection, and in regards to allergies to juvederm, they are fairly rare.
That being said, there is always a first time for a reaction to occur. There is a specific type of allergic drug reaction that does result in joint pain (serum sickness, or serum sickness like reactions), but that was mostly seen with antibiotics and other systemic medications. Going into this specific type is outside the scope of answering this question and your condition, regardless of the cause, should be brought to the attention of your PCP immediately.
For all patients, arthritis bears no influence on the decision to do Juvederm, and Juvederm has an excellent safety profile in nearly all patients. Enjoy your results and please make sure to see your primary doctor to treat the arthritis!
Good luck!