There are many possible reasons for swollen feet. In most cases, swelling isn’t serious and can be relieved by resting or soaking your feet in ice water.

However, if swelling happens suddenly, it could point to an underlying condition, and you should seek medical attention right away.

Common Causes of Foot Swelling

1. Deep Vein Thrombosis (DVT):
As the Mayo Clinic explains, DVT occurs when a blood clot forms in the body’s deep veins, most often in the legs. Symptoms may include swelling, heaviness, and more visible veins. Some people may have no symptoms at all. DVT is dangerous because it can block blood flow to the lungs, leading to a pulmonary embolism.

2. Achilles Tendonitis:
The Achilles tendon is the body’s strongest tendon and is used constantly during daily activities. Overuse can lead to pain and restricted movement. With Achilles tendonitis, swelling may occur in the ankles and heels, especially after exercise or physical activity.

3. Osteoarthritis:
Osteoarthritis is the most common form of arthritis. When it affects the feet, it can cause pain, tenderness, stiffness, and swelling. Activities like yoga may help ease discomfort.

4. Heart Failure:
The American Heart Association notes that heart failure can sometimes show subtle signs—swollen feet being one of them. This happens when the heart can’t pump properly, leading to fluid buildup in the legs, feet, or ankles.