What should you know about swelling in only the right leg?

Fluid can collect when veins or lymph vessels do not move it efficiently, or after an injury, infection, prolonged sitting or standing. Varicose Veins may cause heaviness, aching and visible winding veins. A clinician also considers a clot when swelling is new, especially if the calf is painful or warm. Conditions affecting the whole body, including Heart Failure or Chronic Kidney Disease, more often cause swelling in both legs, but the pattern still needs individual assessment. Obesity can add pressure to the veins and joints.

Compare both legs and note when the change began, whether shoes or clothes feel tighter, and whether there is redness, heat, pain or a recent journey, operation or injury. Arrange medical advice for unexplained or persistent swelling. Do not massage a suddenly swollen, painful leg until a clinician has advised you. The Swollen Ankles guide may help you describe the change.

Seek emergency help for swelling with sudden shortness of breath, chest pain, coughing blood, faintness or severe weakness. Seek same-day medical assessment for rapidly increasing one-sided swelling, calf pain, warmth, marked redness or a new tender area. These signs need evaluation even when the swelling is not severe.

Ask what may be causing the difference between your legs, whether circulation testing is needed, and whether any medicines or recent events could contribute. Ask how to monitor the swelling safely.