Edema is swelling caused by excess fluid collecting in the body’s tissues. It commonly affects the feet, ankles, legs, or hands, but it can occur in other parts of the body as well.
Many cases of edema are mild and temporary, but new, persistent, or worsening swelling should not be ignored, as it can sometimes be a sign of an underlying medical condition.
Common signs of edema
- Swelling of the feet, ankles, legs, or hands.
- Skin that looks stretched or shiny.
- A feeling of heaviness or tightness in the affected area.
- Pitting edema: when you press on the swollen area with a finger, it leaves a dent that lasts for a few seconds.
Possible causes
Edema can result from:
- Standing or sitting for long periods.
- Pregnancy.
- Eating a very salty diet.
- Certain medications (such as some blood pressure medicines, steroids, or anti-inflammatory drugs).
- Problems with the veins or lymphatic system.
- Heart, kidney, or liver disease.
Signs that need prompt medical evaluation
Seek medical care promptly if edema:
- Appears suddenly without an obvious cause.
- Affects only one leg and is accompanied by pain, redness, or warmth, as this could be a sign of a blood clot.
- Is accompanied by increasing pain, skin changes, or sores.
- Persists or gradually worsens despite self-care.
Seek emergency care immediately if edema is accompanied by:
- Shortness of breath or difficulty breathing.
- Chest pain or pressure.
- Coughing up pink, frothy sputum.
These symptoms can indicate fluid in the lungs or another serious condition that requires urgent treatment.
Managing mild edema
Depending on the cause, it may help to:
- Elevate the affected limbs above heart level when possible.
- Stay physically active and avoid sitting or standing in one position for long periods.
- Wear compression stockings if recommended by a healthcare professional.
- Reduce excess dietary sodium if appropriate.
Because edema is a symptom rather than a disease, the right treatment depends on identifying and addressing the underlying cause. If you develop new or persistent swelling, especially if you have heart, kidney, or liver disease, it’s important to discuss it with your healthcare provider.
