What is edema?
Edema is swelling caused by extra fluid that gets trapped inside of your body’s tissues. Formerly known as dropsy, this swelling is typically most noticeable in your hands, arms, legs, ankles, and feet, but it can occur in any part of your body.
Edema has multiple causes, ranging from prolonged periods of sitting to congestive heart failure. To lessen the symptoms of edema, you can take medication to remove the excess fluid and lower the amount of salt in your blood.
Several home remedies can help with the symptoms of edema. However, if edema is a sign of an underlying disease, you’ll need to seek separate treatment for the disease itself.
Signs of edema
The following are signs of edema:
- The tissue directly beneath your skin is swollen, particularly in your legs and arms
- Your skin is puffy or shiny
- Your abdomen (belly) appears bigger than normal
- When you press down on your skin for a few seconds, it retains a dimple shape or pit
Types of edema
Each type of edema is usually named after the body part where it occurs. Although edema can affect numerous parts of your body, it most commonly occurs in your legs or feet. The main types of edema are
- Cerebral edema, excess fluid in your brain
- Angioedema, swelling in the deeper layers of your skin that can occur on your face, hands, and feet
- Hereditary angioedema, a rare genetic condition that causes your capillaries to release fluid into your tissues
- Papilledema, swelling of your optic nerve (the nerve that connects your eye to your brain)
- Macular edema, swelling of a certain part of your eye (the macula)
- Dependent edema, edema in your legs and lower body caused by gravity and your body’s positioning
- Scrotal lymphedema, the enlargement of your scrotum caused by a buildup of fluid around your testes
- Lipedema, a disorder of your fatty tissue that causes swelling in your legs and hips
Causes of edema
There are six causes of edema, ranging from seemingly minor, like staying in a certain position too long, to serious and life-threatening. Some of the most common causes of edema are:
1. Long periods of standing or sitting
Sitting or standing for too long can cause extra fluid to build up in your feet, ankles, and lower legs. This occurs especially in hot weather conditions.
2. Venous insufficiency
When small valves inside the veins of your legs become weakened, you can develop a condition called venous insufficiency. This makes it harder for your veins to pump blood back to your heart and can cause varicose veins and buildup of excess fluid.
3. Chronic (long-term) lung diseases
If you have severe chronic lung diseases, such as chronic bronchitis or emphysema, you’re at risk for experiencing edema. That’s because these conditions increase pressure in blood vessels running from your heart to your lungs, which backs up in your heart. The added pressure can cause swelling in your legs and feet.
4. Congestive heart failure
Congestive heart failure occurs when your heart can no longer pump blood normally. This condition causes fluid buildup in your lungs as well as other parts of your body. Swelling in your legs or feet is one of the common signs of congestive heart failure.
During pregnancy, your uterus puts pressure on your vena cava, which is a major blood vessel that brings blood from your legs back to your heart. Edema can also be caused by a more serious condition called preeclampsia, which affects around 5% of pregnancies and occurs in the third trimester of pregnancy. If you have this condition, you may notice swelling in your hands, feet, or face.
6. Low levels of protein
Malnutrition, kidney disease, and liver disease can all cause low levels of protein in your blood. Proteins help hold salt and water inside of your blood vessels and keep fluid from leaking into your tissues. When you don’t have enough of a blood protein called albumin, this fluid leaks out and causes edema in your feet, ankles, and lower legs.
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When to see the doctor for edema
You should reach out to your doctor if you experience any of the above symptoms or signs of edema. You should seek immediate medical care if you experience:
To understand the cause of your edema, your doctor will first ask you a series of questions about your symptoms and medical history and will then perform a physical exam. If further information is required to make a diagnosis, your doctor may perform any of the following tests:
Treatments for edema
In most cases, mild edema goes away on its own. You can also speed up your recovery by trying home remedies. More severe edema may require medication that helps your body get rid of the excess fluid.
If you have severe edema, your doctor may prescribe a type of medicine called a diuretic. Diuretics help your kidneys form urine and in turn help your body eliminate excess water. Furosemide (Lasix) is one of the most commonly prescribed diuretics.
Actions you can take at home to help lessen your symptoms of edema include:
- Standing up and walking around at least once an hour
- Elevating the swollen body part above the level of your heart
- Wearing compression stockings over the affected limb(s)
- Keeping the affected area protected by ensuring it is clean, well-moisturized, and free from injury
- Reducing the amount of salt in your diet, as salt can increase fluid retention
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Top What Are the Main Causes of Edema Related Articles
Edema (Pitting)Edema is the swelling of tissues as a result of excess water accumulation. Peripheral edema occurs in the feet and legs. There are two types of edema, non-pitting edema and pitting edema. Causes of pitting edema is caused by systemic diseases (most commonly involving the heart, liver, and kidneys), and medications. Local conditions that cause edema are thrombophlebitis and varicose veins. Edema or swelling of the legs, feet, ankles, and face are common during pregnancy. Idiopathic edema is edema in which the cause is not known. Pitting edema is scored on pitting edema measurement scales. Edema is generally treated with medication.
Heart failure (congestive) is caused by many conditions including coronary artery disease, heart attack, cardiomyopathy, and conditions that overwork the heart. Symptoms of heart failure include
- congested lungs,
- fluid and water retention,
- fatigue and weakness, and
- rapid or irregular heartbeats.
There are two types of congestive heart failure, systolic or left-sided heart failure; and diastolic or right-sided heart failure. Treatment, prognosis, and life-expectancy for a person with congestive heart failure depends upon the stage of the disease.
Heart Failure QuizWhat is heart failure? Learn about this dangerous condition, as well as who is at risk, and what to do about it.
LymphedemaLymphedema is a condition in which one or more extremities become swollen as the result of an impaired flow of the lymphatic system. There are two types of lymphedema: primary and secondary. Filariasis is the most common cause of lymphedema worldwide. In the U.S., breast cancer surgery is the most common cause. Symptoms include swelling of one or more limbs, cracked and thickening skin, and secondary bacterial or fungal infections of the skin. There is no cure for lymphedema.
Pulmonary EdemaPulmonary edema (swelling or fluid in the lungs) can either be caused by cardiogenic causes (congestive heart failure, heart attacks, abnormal heart valves) or noncardiogenic causes such as ARDS, kidney failure, high altitude, pneumothorax, pleural effusion, aspirin overdose, pulmonary embolism, and infections. The treatment of pulmonary edema depends on the cause of the condition.
What Causes Swollen Feet and Swollen Ankles?Swollen ankles and swollen feet is a symptom of an underlying disease or condition such as edema, medications, pregnancy, injuries, diseases, infections, lymphedema, or blood clots.