They may check for pitting edema, skin discoloration, varicose veins, tenderness, temperature changes, and signs of infection.
They may also measure blood pressure, assess the pulse, listen to the heart and lungs, and look for other signs of fluid retention.
3. Blood tests
Depending on the suspected cause, blood tests may include:
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Kidney function tests, including creatinine and eGFR.
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Electrolytes such as sodium and potassium.
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Liver enzymes and bilirubin.
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Albumin levels.
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Complete blood count.
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Thyroid function tests.
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Tests associated with heart failure, such as B-type natriuretic peptide (BNP) or NT-proBNP.
Not every patient needs every test. The choice depends on the symptoms and examination findings.
4. Urine tests
A urine test can help identify protein leakage, blood, infection, or other abnormalities.
The urine albumin-to-creatinine ratio is particularly useful when evaluating possible kidney damage.
5. Ultrasound of the leg veins
If a blood clot is suspected, doctors may request a venous duplex ultrasound.
This test uses sound waves to assess blood flow through the veins and identify possible clots.
It is one of the main imaging tests used to evaluate suspected DVT.
6. Heart investigations
If heart failure is suspected, additional tests may include:
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Electrocardiogram (ECG).
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Echocardiogram.
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Chest X-ray.
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BNP or NT-proBNP blood testing.
An echocardiogram uses ultrasound to assess heart structure and pumping function.
7. Additional imaging
Depending on the clinical situation, doctors may request abdominal ultrasound, chest imaging, or other investigations.
These tests can help identify liver disease, abdominal fluid accumulation, structural abnormalities, or other conditions associated with edema.
Chapter 6: Practical Ways to Reduce Mild Foot Swelling at Home
If swelling is mild, occurs after prolonged standing or sitting, and is not accompanied by warning signs, certain lifestyle adjustments may help.
However, home remedies should never replace medical assessment when swelling is persistent, unexplained, or associated with concerning symptoms.
1. Elevate your legs
Raising your legs above the level of your heart when resting can help fluid move away from the lower extremities.
You can lie down and place pillows beneath your legs.
Try to keep the position comfortable rather than forcing your knees or hips into an awkward angle.
This may be particularly helpful for people whose feet swell after spending many hours standing.
2. Move regularly
Walking activates the calf muscles, which help return blood toward the heart.
If you work at a desk, take short movement breaks throughout the day.
If you stand for long periods, alternate between standing, walking, and sitting when possible.
Simple ankle movements can also help.
Point your toes away from your body, then pull them back toward you. Repeat several times while seated.
3. Reduce excessive sodium
A high-sodium diet can contribute to fluid retention.
Try limiting heavily processed foods and choosing more fresh ingredients.
Read food labels and pay attention to sodium levels in packaged products.
People with heart failure, kidney disease, or cirrhosis may need specific sodium targets established by their healthcare team.
4. Wear comfortable footwear
Tight shoes can increase discomfort when feet are swollen.
Choose footwear with enough room for your toes and avoid shoes that create pressure around the ankles.
If swelling is recurring, consider checking whether your usual shoes still fit comfortably.
5. Consider compression stockings when appropriate
Compression stockings apply controlled pressure to the lower legs, helping support venous blood return.
They may be recommended for people with chronic venous insufficiency or certain types of dependent edema.
However, they are not appropriate for everyone.
People with significant peripheral arterial disease, certain skin conditions, or severe heart failure may require special assessment before using compression.
A healthcare professional can recommend the appropriate pressure and size.
6. Maintain a healthy body weight
Excess body weight can increase pressure on the veins in the lower extremities.
For people who are overweight, gradual weight management may help improve circulation and reduce the burden on the cardiovascular system.
Focus on sustainable changes rather than extreme dieting.
7. Avoid prolonged immobility
Long periods of sitting can contribute to swelling and increase the risk of blood clots in certain individuals.
During long journeys, move your legs regularly and walk when it is safe to do so.
People with a history of blood clots or other risk factors should discuss travel-related prevention with their healthcare provider.
Chapter 7: Foods and Dietary Habits That May Support Healthy Fluid Balance
Food cannot cure the medical conditions that cause edema, but a balanced diet can support cardiovascular, kidney, and metabolic health.
Certain dietary habits may also help reduce excessive sodium intake.
1. Choose more fresh vegetables
Vegetables provide fiber, vitamins, minerals, and plant compounds that support overall health.
Examples include:
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Broccoli.
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Carrots.
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Bell peppers.
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Cabbage.
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Green beans.
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Cucumbers.
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Leafy greens.
Some vegetables contain potassium, which helps regulate fluid balance and blood pressure.
However, people with advanced kidney disease or certain medications may need to limit potassium intake. They should follow individualized dietary advice.
2. Eat fruit regularly
Fresh fruit can contribute water, fiber, and essential nutrients.
Apples, berries, oranges, and other fruits can be part of a balanced eating pattern.
However, people with diabetes should consider portion sizes and overall carbohydrate intake.
People with kidney disease may also need guidance about potassium-rich fruits.
3. Choose less processed food
Packaged and highly processed foods can contain substantial amounts of sodium.
Reducing these foods may help people manage sodium intake.
Choose fresh or minimally processed ingredients more often when practical.
4. Include appropriate protein sources
Protein supports tissue maintenance and many essential body functions.
Good dietary sources include fish, eggs, poultry, beans, tofu, and other protein-rich foods.
People with advanced kidney disease or certain liver conditions may need individualized protein recommendations.
Do not begin a high-protein diet or restrict protein substantially without medical advice.
5. Drink an appropriate amount of water
Some people mistakenly believe that swollen feet mean they should stop drinking water.
This is not generally a safe approach.
Dehydration can create other health problems and may affect kidney function.
However, people with certain conditions, such as advanced heart failure, severe kidney disease, or cirrhosis with fluid complications, may receive specific fluid restrictions.