The presence of a swollen foot may indicate several clinical possibilities: first, the most common is venous thrombosis of the lower extremities. If the foot has had previous trauma and varicose veins, this can lead to venous thrombosis in the foot. Once a vein thrombosis occurs, the return of venous blood is impeded, which can cause swelling in the foot. Secondly, a herniated disc that causes nerve compression can also lead to swelling in one foot. In addition, peripheral neuropathy caused by diabetes can also lead to swelling in one foot.