Thanks for your query. You are having swollen, itchy and tender great toe but the important point is that it is bilateral and for both feet. So this virtually rules out any insect bite, infection or allergic reaction
Bilateral painful toe swelling is a characteristic feature in gout
, venous thrombosis
due to blood clot or arthritis
. Since you are having arthritis, so this is an important possibility as it can be due to worsening of arthritis. But at the same time, gouty arthritis needs to be ruled out. In gout, uric acid crystals deposits in the joints causing swelling, pain and tenderness. Big toe is commonly affected. Please consult an orthopedician and get your blood uric acid levels and an x-ray of the toe joints done.
Hope this answers your query. If you have additional questions then please do post us. Wishing you good health.