Swelling in only one leg can occur due to an infection, varicose veins in the lower leg, an insect bite or a blood clot, explains University of Minnesota Medical Center. Other potential causes are injuries, recent surgical procedures, clothing or accessories that press against the leg, and venous insufficiency.
Venous insufficiency occurs when blood builds up within the deep veins inside of the leg, notes University of Minnesota Medical Center. Meanwhile, varicose veins result when veins become enlarged. A garter is an example of an accessory that can place pressure on one leg, causing it to swell. The appropriate treatment to address the swelling depends on its origin. Taking medications appropriately, avoiding staying in one position for a long time and sitting with the legs raised are some steps individuals can take to prevent swelling.
Patients should seek immediate medical attention if they experience certain symptoms along with swelling in one leg, states University of Minnesota Medical Center. Fevers higher than 100.4 degrees Fahrenheit, coughing up blood, difficulty breathing, or chest pain when breathing in or out can signal a serious medical problem. Passing out, dizziness and weakness are also concerning symptoms that require prompt medical help. Individuals should also seek the assistance of a trained medical professional if they experience calf pain along with the swelling or if the leg or foot is red, feels warm or becomes increasingly swollen.