In general, high blood sugar does not cause recurrent joint effusion. It is only when the joints become diseased or when certain systemic diseases occur, such as trauma, infection, inflammation and chronic strain in daily life, that joint fluid increases, i.e., joint effusion is formed. Therefore, repeated joint effusion is usually not related to high blood sugar. In a small amount of joint effusion, the joints are sore, uncomfortable and slightly painful, but the joint movement can be normal. In large amounts of fluid accumulation, joint movement is significantly limited. In addition, it is recommended that patients with recurrent joint effusion should go to the hospital in time to do relevant examinations, and after clarifying the cause of the disease, they need to be actively treated under the guidance of the doctor.