Swelling of the ankles or legs (edema) is a very common reason for consultation. It is often related to prolonged standing, heat or venous circulation problems. But it can also be a sign of fluid retention due to heart, kidney or liver causes. The difference usually lies in the pattern of the swelling, whether it is in one or both legs, how fast it appears and what other symptoms are present.
The most important
- Mild swelling at the end of the day may be due to heat, standing or poor venous circulation, but if it becomes frequent, progresses or does not improve with rest, it should be checked.
- Consider a heart cause if the swelling is accompanied by shortness of breath, marked tiredness, choking when lying down or nighttime awakenings with shortness of breath.
- It is urgent if the swelling appears suddenly with intense shortness of breath, chest pain, fainting, or if a leg swells suddenly and hurts (risk of thrombosis).
What is edema and how can it be noticed?
Edema is fluid accumulation in the tissues. It can be noted as:
- More swollen ankles or legs at the end of the day
- Deep sock marks
- Feeling of heaviness or “tightness” in the skin
- In some cases, pressing with the finger for a few seconds leaves an indentation.
One key piece of information: whether it is one leg or both legs. Swelling in one leg usually requires a different evaluation than swelling in both legs.
When is it urgent?
Seek immediate attention if:
- Swelling is accompanied by severe shortness of breath at rest, purple lips or confusion.
- There is pain or pressure in the chest; in this case check also acute myocardial infarction and, if you have already published it, chest pain: common causes and when is it an emergency?
- A leg swells suddenly and there is also pain, warmth or redness (possible thrombosis).
- Swelling progresses rapidly over a few days and is accompanied by marked weakness, fainting or accelerated worsening of shortness of breath.
Common causes of leg swelling
Venous circulation (very frequent)
It usually happens when:
- You stand or sit for long hours
- There is heat
- Varicose veins or heaviness in legs
- Improved by elevating the legs or waking up
It is usually more noticeable in the ankles and at the end of the day.
Fluid retention by the heart (heart failure)
When the heart does not pump efficiently, the body may retain fluids. Clues that raise suspicion:
- Swelling that becomes constant or is increasing
- Rapid weight gain in a few days with no clear explanation
- Shortness of breath on exertion or at rest
- Choking at bedtime or need for several pillows
- Waking up at night with shortness of breath
- Marked fatigue or reduced exercise tolerance
If this sounds familiar, check out cardiac insufficiency and the article shortness of breath: when it can be from the heart and when not.
Kidney and liver
Some kidney or liver conditions can also cause edema, especially if:
- Swelling is more generalized
- There are changes in urine, significant fatigue or abdominal distention.
- It is accompanied by other systemic symptoms.
The origin cannot be assumed without evaluation.
Medications (very common and overlooked)
Some medications may promote edema (e.g., certain blood pressure medications and anti-inflammatory drugs, among others). Do not discontinue them on your own: the right thing to do is to review options and adjustments with your doctor.
Pregnancy and hormonal situations
Swelling may occur in pregnancy, especially at the end of the day. Even so, if it is accompanied by severe headache, blurred vision or high blood pressure, it should be checked immediately.
When to suspect heart failure more strongly
Cardiologic evaluation is appropriate if the swelling comes with one or more of these points:
- Shortness of breath that you did not have before or that is increasing
- Choking at bedtime or need for more pillows
- Nocturnal awakening with shortness of breath
- Rapid unexplained weight gain
- Marked fatigue or reduced exercise tolerance
If there is also hypertension, diabetes or high cholesterol, the threshold for evaluation should be lower. You can check hypertension y diabetes and heart: goals.
What the evaluation with the cardiologist may include
The assessment usually focuses on identifying the cause and ruling out major problems. Depending on the case, it may include:
- Targeted medical history: since when, if it is one or both legs, if it gets worse during the day, if it improves when lifting, weight changes, shortness of breath, palpitations, etc.
- Physical examination and blood pressure check
- A electrocardiogram (ECG)
- Additional studies if heart failure or other structural condition is suspected, depending on findings.
If you keep a pressure log at home, it can help a lot in the consultation. Check blood pressure: goals and measurement at home.
What you can do while being assessed (without self-medicating)
- Observe whether the swelling is in one or both legs and at what times it gets worse.
- Weigh yourself at the same time for several days if you suspect retention (only to detect rapid changes).
- Elevate legs when resting and avoid being immobile for long periods of time.
- Do not start diuretics on your own or adjust medications without a doctor's prescription.
When to schedule a consultation
Agenda valuation yes:
- Swelling is recurrent or increasing
- Shortness of breath, marked fatigue or decreased exercise tolerance
- Unexplained rapid weight gain
- Do you have a history of heart disease or risk factors?
You can review the cardiological check up o schedule an appointment.
References
- American Heart Association. Heart Failure Signs and Symptoms. See source
- Mayo Clinic. Edema. See source
- NHS. Swollen ankles, feet and legs (oedema). See source