Swelling in your feet, ankles, and legs-called peripheral edema-happens when excess fluid builds up in tissues. Common causes include prolonged standing, pregnancy, or minor injuries. Severe or persistent swelling may indicate heart, kidney, or liver problems.
How Swelling Works
Your body maintains fluid balance through blood vessels, capillaries, and lymph nodes. When tiny blood vessels leak fluid into surrounding tissues, swelling occurs. Gravity pulls fluid downward, which is why your lower extremities often swell first.
Main Causes
Swelling can result from many factors, including:
Prolonged standing or sitting: Stasis edema happens when blood pools in your legs due to inactivity.
Pregnancy: Increased blood volume and pressure from the uterus can cause swelling, especially in the third trimester.
Injuries: Sprains, fractures, or other trauma trigger inflammation and fluid buildup.
Medications: Some drugs, like blood pressure medications or NSAIDs, list swelling as a side effect.
When to See a Doctor
Mild swelling often resolves on its own, but seek medical attention if:
Swelling is sudden or severe.
It happens with pain, redness, or warmth.
You have shortness of breath or chest pain.
One leg swells without an obvious cause.
These symptoms could signal deep vein thrombosis (DVT), heart failure, or other serious conditions.
Common Misconceptions
What to Do at Home
For mild swelling, try these remedies:
Improve your legs above heart level for 30 minutes, 3-4 times daily.
Wear compression stockings to improve circulation.
Stay hydrated and reduce salt intake to help your body manage fluids.
Exercise regularly to promote blood flow.
I once experienced swelling after a long flight. Elevating my legs and staying hydrated helped, but if the swelling had lasted more than a few days, I would have seen a doctor.
