The possible reasons for the swelling and pain after six months of operation for comminuted fracture of the heel bone include fracture not completely healed, venous thrombosis of the lower limb, traumatic arthritis, etc. Different causes of the different treatments, mainly including medication and surgical treatment. 1. Fracture has not completely healed: in this case, you can consider using calcium citrate, calcium carbonate and other calcium supplements to replenish calcium, if the examination found that the gap between the fracture ends is still large, you can also undergo surgical treatment, such as bone grafting, surgical incision and internal fixation. 2. Lower extremity venous thrombosis: anticoagulant drugs such as low molecular weight heparin and ordinary heparin can be chosen for treatment, and thrombolytic drugs such as streptokinase and urokinase can also be considered. If necessary, surgical treatment such as saphenous vein stripping can also be accepted. 3. Traumatic arthritis: it usually shows swelling and pain in the ankle. In this case, non-steroidal anti-inflammatory drugs such as ibuprofen and acetaminophen can be used, and surgical treatments, such as arthroscopic cleanup and fusion of joints, can also be performed in severe cases. The above medications need to be used under a doctor’s supervision. When it has been six months since the operation of comminuted heel fracture and the foot still has the symptoms of swelling and pain, it is recommended to consult a doctor in time to clarify the cause of the disease and receive appropriate treatment.