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Though there are no studies that have shown any real connection between what patients eat and the frequency and severity of their flare-ups, it is possible that some people with psoriatic arthritis might have food triggers that worsen their symptoms.
Some foods to avoid include sugar, because it increases inflammation in the body, and red meat and other animal fats, as there is some evidence they may worsen joint pain (choose unsaturated fats from olive oil, avocados, and walnuts instead). Colorful foods like leafy green vegetables and fruits including pomegranate, with their high antioxidant content, may help with tenderness, stiffness and swelling. It’s also important to watch your weight, as studies have shown obesity increases the risk for psoriatic arthritis and increases disease severity.