It should be abnormal to have bulges in the toe joints. Osteoarthritis, tendon sheath cysts, rheumatoid arthritis, gout, tumors, etc. are mostly considered. 1. Osteoarthritis: degenerative hyperplasia of the toe joints causes joint hyperplasia and deformation, localized bulge and hard texture. 2. Tendon sheath cyst: synovial fluid around the joint leaks into the surrounding tissue, forming a parcel, soft texture, smooth benign swelling. 3. Rheumatoid arthritis: it can involve the toe joints, with symmetrical enlargement, deformation, pain and morning stiffness. 4. Gout: Chronic gout forms gout stones with hard nodules in the joints, and localized redness, swelling and fever during acute attacks. 5. Tumor: bone tumor of toe bone causes bone destruction and local lumps. If there are unexplained bulges in the toe joints, it is recommended to go to the hospital to improve the examination and clarify the cause of the disease.