Swollen Feet: 12 Possible Causes (& How to Treat)

Swollen feet often occur from standing for long periods or as a common side effect of certain medications. While this condition is often minor, it can sometimes signal underlying health issues like kidney or liver problems.

Most cases of swelling tend to improve throughout the day or after resting with your feet elevated. You should seek medical advice if the swelling is accompanied by other symptoms like fever, chills, or persistent headaches.

Simple lifestyle changes such as wearing compression stockings or elevating your legs can offer significant relief. Your healthcare provider may also suggest specific treatments depending on the underlying cause of your discomfort.

Why are my feet swollen?

The primary causes of swollen feet include:

1. Prolonged standing or sitting

When you spend too much time sitting or standing, blood circulation can slow down, making it difficult for blood to return to the heart. This causes fluid to pool in the lower limbs, resulting in swollen feet along with a heavy sensation or tingling in the legs.

How to treat: It is recommended to avoid staying in one position for too long and to perform regular stretching exercises to boost circulation. Additionally, elevating your legs can help encourage blood flow back toward the heart.

2. Medication side effects

Certain drugs, such as corticosteroids, oral contraceptives, steroids, antidepressants, and blood pressure or heart medications, can cause fluid retention. This side effect frequently leads to noticeable swelling in the feet.

How to treat: Generally, the swelling will gradually decrease once the medication is stopped. It is essential to consult your doctor to evaluate the swelling and determine if your prescription can be safely adjusted or switched.

3. Pregnancy

It is very common for feet and ankles to swell during pregnancy because the body produces more blood and the growing uterus puts pressure on pelvic veins. This typically interferes with circulation and is most noticeable from the fifth month of pregnancy onward.

How to treat: In these cases, a doctor may suggest wearing compression stockings to support circulation. Keeping your legs elevated while sitting or lying down is also highly effective for reducing discomfort.

4. Preeclampsia

Preeclampsia is a serious condition that can develop after the 20th week of pregnancy, characterized by high blood pressure. It occurs when placental blood vessels do not develop properly, restricting blood flow and causing significant swelling in the feet and ankles.

Beyond swollen feet, preeclampsia can cause symptoms like headaches, decreased urination, sudden weight gain, and blurred vision. High blood pressure readings are the primary clinical sign of this condition.

How to treat: It is vital to see an obstetrician immediately to monitor blood pressure and assess the severity of the condition. Treatment may involve bed rest, specialized medications, and dietary changes like reducing salt intake.

In severe instances, hospitalization is required to prevent complications such as HELLP syndrome, placental abruption, or seizures.

5. Lymphedema

Lymphedema happens when lymphatic fluid builds up in the soft tissues, often after surgery, infections, or inflammatory diseases. This blockage prevents proper drainage, leading to persistent swelling in the feet and other areas of the body.

How to treat: You should consult a specialist to determine the best course of treatment. Management usually includes physical therapy, the use of compression bandages, specific exercises, and sometimes medication.

6. Venous insufficiency

Venous insufficiency occurs when the valves in the leg veins do not work effectively, making it hard for blood to return to the heart from the limbs. This causes fluid to leak into surrounding tissues, resulting in swollen feet, leg cramps, and a tingling sensation.

How to treat: A cardiologist or vascular specialist can confirm this diagnosis. Treatment typically involves the use of medical-grade compression stockings and specific medications to improve venous tone.

7. Elephantiasis

Elephantiasis, often called filariasis, is a tropical disease caused by parasites transmitted through mosquito bites. These parasites block the lymphatic system, leading to severe fluid accumulation and swelling in the feet and ankles.

Other common symptoms include fever, headache, chills, and swollen lymph nodes in the groin area. In some cases, it can also cause significant swelling in the scrotum.

How to treat: Treatment is overseen by an infectious disease specialist. It usually involves antiparasitic medications like ivermectin combined with albendazole, though surgery may be necessary in advanced cases.

8. Thrombosis

Thrombosis involves the formation of a blood clot within a deep vein, which obstructs normal blood flow. This causes swelling in the feet and legs, often accompanied by pain in the calf or thigh, difficulty walking, and warmth in the affected area.

How to treat: You should seek immediate care from a vascular surgeon or general practitioner. Treatment focuses on preventing the clot from growing or traveling to the lungs, typically through the use of anticoagulant medications.

9. Varicose veins

Varicose veins are enlarged, twisted veins that occur when vein walls and valves are weak. This prevents efficient blood return to the heart, leading to swollen feet, itchy skin, dark spots on the legs, and a feeling of leg fatigue.

How to treat: A vascular surgeon may recommend procedures to remove or close the affected veins to improve blood flow. Other recommendations include regular exercise, lymphatic drainage massage, and wearing compression stockings.

Read more about how to get rid of varicose veins using natural remedies.

10. Kidney issues

Conditions that impair kidney function, such as chronic kidney disease or infections, prevent the body from properly filtering waste and fluid. This often manifests as swollen feet, back pain, itchy skin, and changes in urination patterns.

How to treat:  It is important to see a nephrologist to treat the underlying cause. Management may include dietary restrictions, increased water intake, specific medications, or dialysis in more advanced stages.

11. Lipedema

Lipedema is a chronic condition characterized by a symmetric buildup of fat in the legs and feet. This often leads to swelling, tenderness, easy bruising, and a heavy feeling that can make walking difficult.

How to treat: Treatment aims to manage symptoms and improve mobility under the care of a physician. Common approaches include manual lymphatic drainage, physical therapy, and consistent use of compression garments.

12. Liver failure

Liver failure occurs when the liver is too damaged to function, which can lead to a drop in protein levels that normally keep fluid in the bloodstream. This results in fluid leaking into the tissues of the legs and feet, as well as abdominal swelling, jaundice, and dark urine.

How to treat: A hepatologist will determine the treatment based on the cause of liver damage. This may involve strict dietary changes, medications to manage complications, or a liver transplant in life-threatening cases.