Swollen Feet and Ankles – Causes, Remedies and Warning Signs

Swelling in the feet and ankles, medically known as peripheral edema, occurs when fluid accumulates in the tissues. While often temporary and harmless, it can sometimes signal an underlying health problem. Understanding the possible causes, knowing which home remedies actually work, and recognizing when to seek medical attention are essential for managing this common symptom.

Most people experience swollen feet or ankles at some point. The swelling may follow a long flight, a salty meal, or a day on your feet. In many cases it resolves on its own. But persistent or one-sided swelling warrants a closer look.

This guide covers the most frequent causes of edema, fast relief strategies, treatment options, and the warning signs that should never be ignored. It draws on information from leading health organisations including the NHS, the British Heart Foundation, and Harvard Health.

What causes swollen feet and ankles?

• Swollen feet and ankles are often temporary and harmless, but can signal serious conditions like heart failure.
• Elevation and reduced salt intake are the fastest home remedies for mild swelling.
• Pregnancy-related swelling is common in the third trimester and usually resolves postpartum.
• Diabetes increases risk of peripheral edema due to kidney damage or poor circulation.
• Elderly individuals may experience swelling from medication side effects, venous insufficiency, or inactivity.
• Persistent swelling requires medical evaluation to rule out underlying organ disease.

How to get rid of swollen ankles fast?

For mild, recent swelling that affects both feet or ankles, a few simple strategies can provide quick relief. These methods work by encouraging fluid to drain from the tissues back into the bloodstream.

Elevate your legs

Raising your legs above the level of your heart for 15 to 30 minutes several times a day uses gravity to help move fluid out of the feet and ankles. Lying down with your feet propped on pillows is one of the most effective home remedies.

Reduce salt intake

Sodium causes the body to retain water. Cutting back on processed foods, salty snacks, and added table salt can noticeably reduce swelling within a day or two. The British Heart Foundation notes that lifestyle factors like eating too much salt contribute to swollen ankles.

Stay hydrated and move regularly

Drinking enough water helps flush excess sodium. Gentle walking or ankle pumps stimulate the calf muscles, which act as a pump to return blood and fluid upward. Avoid sitting or standing still for long stretches.

What are the best treatments for swollen feet and ankles?

Treatment depends entirely on the underlying cause. When a medical condition such as heart failure, kidney disease, or liver cirrhosis is responsible, managing that condition is the priority. For lifestyle-related swelling, home measures often suffice.

Medical treatments

If conservative measures fail, a doctor may prescribe diuretics (water pills) to help the kidneys remove excess fluid. However, diuretics are not appropriate for all types of edema – for example, they can worsen swelling caused by venous insufficiency. The Harvard Health article on swollen feet emphasises that treating the root cause is essential.

Compression therapy

Medical-grade compression stockings are a mainstay for venous insufficiency and lymphedema. They are prescribed based on the severity of swelling and must be fitted correctly to avoid restricting circulation.

Lifestyle adjustments

For many people, consistent changes – a low-sodium diet, regular exercise, weight management, and avoiding prolonged sitting – are enough to keep swelling under control. The NHS lists common causes of oedema including injuries, kidney problems, and heart conditions, and recommends seeing a GP if swelling persists.

Are swollen feet dangerous? When to see a doctor?

Most swelling is not dangerous. However, certain features raise the level of concern. The following signs should prompt an urgent visit to a healthcare provider or emergency department:

• Swelling that appears suddenly in only one leg or foot
• Pain, redness, or warmth in the swollen area
• Shortness of breath or chest pain
• Fever accompanying the swelling
• Skin that feels tight, looks shiny, or breaks open
• Rapid worsening of swelling over hours or days
• Swelling that leaves a deep pit when pressed (pitting edema)
• Dark urine or yellowing of the skin (jaundice)
• Coughing up blood

A doctor will assess whether the swelling is one-sided or both-sided, check for pitting, review your medication list, and evaluate your heart, kidney, liver, and circulatory health. Tests may include blood work, urine analysis, an ultrasound for DVT, or cardiac imaging.

What causes swollen feet and ankles during pregnancy?

Mild swelling in the feet and ankles is extremely common during pregnancy, especially in the third trimester. The body produces about 50% more blood and body fluids to support the baby, and the growing uterus puts pressure on veins that return blood from the legs.

Rest, leg elevation, lying on the left side, and avoiding prolonged standing usually help. However, sudden or severe swelling – especially if it involves the face or hands, or is accompanied by headache or visual changes – could indicate preeclampsia and requires immediate medical evaluation.

For more information on managing health during pregnancy, see our Pregnancy health guide.

Can diabetes cause swollen feet and ankles?

People with diabetes are at higher risk for peripheral edema for several reasons. Poor blood sugar control can damage the kidneys (diabetic nephropathy), leading to fluid retention. It can also impair circulation, making it harder for fluid to move out of the legs.

Additionally, diabetic neuropathy may reduce sensation in the feet, so swelling and associated injuries may go unnoticed. If swelling is accompanied by redness, warmth, pain, skin breakdown, or fever, an infection or diabetic foot ulcer may be present. Anyone with diabetes and new or worsening swelling should see a healthcare provider promptly.

How does swelling progress over time?

The timeline of swelling can offer clues about the cause and urgency. Acute swelling that appears within hours to a couple of days is often due to an injury, insect bite, heat, or a high-salt meal. Subacute swelling lasting days to two weeks may occur with pregnancy, long travel, or starting a new medication. Chronic swelling beyond two weeks suggests an ongoing medical issue such as heart failure, kidney disease, or venous insufficiency.

1. Acute (hours to 2 days): Causes include sprains, strains, insect bites, heat, or high-salt meals. Action: rest, ice, elevation, over-the-counter anti-inflammatories.
2. Subacute (2 days to 2 weeks): Causes include pregnancy, long-distance travel, medication start, or mild venous insufficiency. Action: continue home remedies, monitor, consult pharmacist or GP if worsening.
3. Chronic (persistent beyond 2 weeks): Causes include heart failure, kidney disease, liver cirrhosis, deep vein thrombosis, or diabetes. Action: urgent medical evaluation and treatment of underlying condition.

What is certain and what remains unclear about foot and ankle swelling?

What is the broader context of foot and ankle swelling?

Peripheral edema is a symptom, not a disease. It reflects a fluid imbalance within the interstitial space – the area between cells. Common lifestyle factors such as prolonged sitting and a high-sodium diet interact with serious medical conditions like heart, kidney, and liver disease to produce swelling. In 2025, rising rates of sedentary behaviour and obesity have made edema more prevalent. Understanding when to self-manage and when to seek care is critical.

Leading health organisations – including the NHS, the American Heart Association, and the British Heart Foundation – emphasise that self-care is appropriate for mild, transient cases, but that persistent or worsening swelling warrants investigation to prevent complications such as skin ulcers, cellulitis, or thromboembolism.

What do the experts and sources say?

“Common causes of swollen ankles, feet and legs include an injury – such as a strain or sprain, an insect bite or sting, problems with your kidneys, liver or heart.”

— NHS

“Swollen ankles and feet can be caused by lifestyle factors, like eating too much salt and being inactive, and can also be a sign of heart problems.”

— British Heart Foundation

“Swelling is a common symptom of a foot or ankle injury. An ankle sprain is one of the most common musculoskeletal injuries in people of all ages.”

— Harvard Health

Additional resources from London Medical and Expert Cardiologist provide further clinical context.

What should you do next?

If your swelling is mild and recent, start with home remedies: elevate your legs above heart level, reduce your salt intake, stay hydrated, and move around regularly. If swelling persists longer than two weeks or worsens, schedule an appointment with a primary care provider. For sudden, one-sided, painful, or red swelling – or if you experience shortness of breath or chest pain – seek emergency care immediately. Pregnant women should discuss any significant swelling with a midwife or obstetrician, and people with diabetes should monitor blood sugar and check for signs of kidney disease. For more on leg symptoms, see our guide to Common causes of leg pain and swelling.