Osteoporosis may cause swelling of the ankle, and the mechanism of this kind of disease causing swelling of the ankle is mainly as follows.1, this kind of disease may occur in the ankle joint, and then directly cause aseptic inflammation, and inflammation will lead to swelling of the ankle joint.2, when osteoporosis occurs in the patient, it may be due to the decline in bone strength, and then the patient’s ankle joint is easy to appear rapid degeneration. Degeneration. Once the patient develops osteoarthritis or other diseases in this area, it may cause swelling of the ankle joint.3. Osteoporosis may lead to pathological fracture of the ankle joint or calf, which may cause obvious swelling around the ankle joint.4. When the patient develops osteoporosis, he/she may develop severe generalized edema due to concurrent electrolyte disorders or severe malnutrition, which may manifest itself in the ankle joint. It may be more pronounced in the ankle joint.