I had that feeling from my knees down and for now it's only left in my left foot and ankle. the magnetic resonance shows synovitis and my left foot is completely stiff and I can't bend my toes, the roots of my toes are stiff as well as the foot bridge and now I had a gout attack in that foot in October 2023 and since then my symptoms have not gone away . I don't take any medicine. What condition can lead to synovitis?