What causes edema?

What causes edema?

After your healthcare provider makes an edema diagnosis, their next step is to identify what caused fluid to build up in your tissues. There are several possible causes for an edema diagnosis including:

• Gravity: If you spend a lot of time sitting or standing in one place for too long, water naturally pulls down into your arms, legs and feet (dependent edema).
• Weakened valves of your veins (venous insufficiency): When the valves in your veins are weak, it is hard for your veins to push blood back up to your heart, and leads to varicose veins and a buildup of fluid in the legs.
• Underlying medical conditions: Conditions like heart failure and lung, liver, kidney and thyroid diseases have edema as a symptom.
• Side effects from medication: Some drugs, like blood pressure or pain management medications, have edema as a side effect.
• Poor nutrition: If you aren’t eating a well-balanced diet or if you eat a lot of foods high in salt (sodium), fluid could build up in different parts of your body.
• Pregnancy: Swelling in your legs during pregnancy occurs as the uterus puts pressure on your blood vessels in the lower trunk of your body.
• Compromised immune system: An allergic reaction, infection, burns, trauma or clots can lead to edema.