A swollen leg, or unilateral edema, occurs when excess fluid collects in one leg due to injury, infection, or chronic conditions like deep vein thrombosis. This swelling can happen suddenly or develop gradually.
Several factors can lead to swelling in one leg. The most frequent causes include:
Other potential causes include:
Seek medical attention if the swelling is severe, worsens quickly, or is accompanied by pain, redness, or warmth. These symptoms could indicate a serious condition like DVT or an infection. If you notice one of your feet is swollen, along with other symptoms, consult a healthcare provider for a thorough evaluation.
According to the American Heart Association, sudden swelling in one leg, especially if it's painful, should be evaluated promptly to rule out DVT. Chronic swelling that doesn't improve with rest or elevation may require further investigation.
Doctors diagnose the underlying cause through physical exams, medical history, and tests like ultrasounds, blood tests, or imaging scans. Treatment varies depending on the cause but may include compression stockings, medications, or lifestyle changes.
For example, if DVT is suspected, anticoagulant medications may be prescribed to prevent the clot from growing. For lymphedema, compression garments and manual lymphatic drainage can help manage symptoms.
I once had a patient with unexplained swelling in one leg. After a series of tests, we discovered it was due to a minor injury that had gone unnoticed. Proper diagnosis and treatment resolved the issue quickly.
To reduce the risk of leg swelling:
Understanding what causes one swollen leg helps in recognizing when to seek medical advice. Early intervention can prevent complications and ensure proper treatment.