While leg swelling (peripheral edema) can occasionally be linked to conditions where blood clots are more common—such as certain types of cancer—it is much more frequently a sign of several other common health issues.
If you notice persistent swelling in your legs, ankles, or feet, it can point to a few different underlying causes:
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Heart Failure: When the heart isn’t pumping blood efficiently, fluid can back up in the blood vessels and leak into surrounding tissues, usually starting in the lower legs and feet due to gravity.
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Deep Vein Thrombosis (DVT): A blood clot in a deep vein, often causing sudden swelling in only one leg, along with pain, warmth, or redness.
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Chronic Venous Insufficiency (CVI): When the valves in your leg veins become weak, allowing blood to pool in your lower extremities.
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Kidney or Liver Disease: Conditions that affect your body’s ability to manage fluid balance and protein levels, leading to generalized fluid retention.
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Medication Side Effects: Certain prescription drugs (such as blood pressure medications, calcium channel blockers, or steroids) list leg swelling as a common side effect.
Because leg swelling can range from a minor circulation issue to a serious medical emergency (like a blood clot or heart trouble), it is important to have it evaluated by a healthcare professional—especially if the swelling comes on suddenly, is painful, or is accompanied by shortness of breath.
Are you or someone you know currently experiencing swelling in one leg or both, and are there any other symptoms like pain or shortness of breath?
