A Swollen Leg That Never Goes Down: Lymphoedema, Filarial Swelling or a Vein Problem?
Published: 13 October 2026
Written by Dr. Ashutosh A Shah, M.B.B.S., M.S., M.Ch., D.N.B., Board Certified Plastic Surgeon. Reg. no. [REG NO]. 22+ years in plastic and reconstructive surgery.
Medically reviewed by Dr. Ashutosh A Shah · Published 13 October 2026 · Last reviewed 13 October 2026
A leg that stays swollen for months is usually lymphoedema, filarial lymphoedema or chronic vein disease. Vein swelling improves overnight and shows brown skin and varicose veins; lymphoedema stays firm with thick skin. A Doppler and lymph assessment decide care, which is mainly compression and skin hygiene, with surgery for selected late cases.
Why is one of my legs always swollen? In adults, the three usual answers are a vein problem, lymphoedema, or lymphoedema left behind by filarial infection years ago. Heart, kidney, liver and thyroid problems also cause swelling, but usually in both legs, and they are ruled out first. Our page on Pair ki sujan ka ilaj covers those general causes. This page compares the three local causes side by side, because treatment of swollen legs differs for each, and explains when lymphedema leg surgery is considered.
How can you tell lymphoedema, filarial swelling and vein swelling apart?
By when it started, whether it goes down overnight, and what the skin looks like. The table is a guide for discussion, not a self-diagnosis tool.
| Feature | Venous swelling | Lymphoedema | Filarial lymphoedema |
|---|---|---|---|
| Onset | Gradual, worse by evening, often with aching legs | Gradual, often starting at the foot and toes; may follow surgery, radiotherapy or repeated infection | Years after living in an area with filaria, often after repeated attacks of fever with a painful red leg |
| Overnight change | Improves with rest and elevation | Improves early on; later stays the same | Improves early on; later stays the same |
| Skin | Brown staining near the ankle, varicose veins, itchy eczema, sometimes an ulcer | Firm, thick skin; the skin on top of the second toe is hard to pinch | Deep skin folds, thick rough skin and warty growths in late stages |
| Key test | Venous duplex Doppler | Doppler to exclude veins, then lymphoscintigraphy | History, filaria blood test, Doppler and lymph imaging |
| First treatment | Compression, then treatment of the faulty veins | Compression therapy and skin care | Daily hygiene care package, treatment of attacks, and anti-filarial tablets if the blood test is positive |
What is the difference between lymphedema and varicose vein swelling?
Vein swelling is fluid that leaks out because blood pools in faulty veins, so it shifts with rest and leaves brown staining. Lymphoedema is protein-rich fluid that the lymph vessels cannot clear, so over time it turns into firm fat and fibrous tissue that rest does not move. Both can exist together, and leg swelling after DVT is a vein problem that can damage the lymph vessels too. If veins are the cause, our guide to Varicose vein surgery explained covers the next step.
Which tests confirm the cause of a swollen leg? What a swollen leg doctor in Bhavnagar should order
A Doppler scan first, then lymph imaging if the veins do not explain the swelling. The 2023 consensus of the International Society of Lymphology (ISL) lists ultrasound as the usual first test to rule out vein disease, and lymphoscintigraphy as very useful for showing lymph vessel damage.
- Blood tests: kidney, liver and thyroid function, sugar and protein, to rule out general causes.
- Venous duplex Doppler: shows faulty valves, blocked veins and old clots.
- Lymphoscintigraphy: a small tracer injected in the foot shows whether lymph flows up the leg.
- Filaria test: a blood antigen test or night blood smear if you have lived in an area with filaria.
Lymphoedema is then staged using the ISL system, which guides treatment.
| ISL stage | What it means |
|---|---|
| Stage 0 | Lymph flow is impaired but no swelling is visible yet |
| Stage I | Early fluid swelling that goes down with elevation; may pit when pressed |
| Stage II | Permanent swelling from fat and protein build-up; elevation rarely helps; pits when pressed, though late stage II may stop pitting |
| Stage III | Elephantiasis, with skin thickening, folds and warty growths |
What does daily non-surgical care involve?
Compression and skin care, every day. The ISL describes decongestive therapy in two phases: first skin care, lymphatic massage, bandaging and exercise to reduce the leg, then fitted compression garments to hold it. For filarial lymphoedema, the WHO care package, used in India's national filaria elimination programme, is built on hygiene, skin care, exercise and elevation. This is the core of lymphedema leg treatment and of filarial leg swelling treatment alike.
Daily leg care checklist:
- Wash the leg and foot with soap and clean water once or twice a day.
- Dry gently, especially between the toes and in skin folds.
- Look for cracks, cuts, peeling or itching between the toes.
- Apply a plain moisturiser to dry skin, not between the toes.
- Raise the leg above hip level when sitting or lying.
- Move the ankle up and down often, and walk daily.
- Wear your compression stocking or bandage as fitted.
- Wear well-fitting footwear; avoid walking barefoot.
When is lymphoedema surgery considered and what does it remove?
When compression has been tried properly and the leg still does not respond, or when the tissue has become too fibrous for compression to shift. The ISL treats surgery as an addition to compression, not a replacement, for properly selected patients. Dr. Ashutosh Shah considers lymphedema leg surgery when:
- Swelling persists after supervised compression therapy.
- The leg is stage II with non-pitting fat, or stage III with folds and warty skin.
- Skin folds keep getting infected, or the weight of the leg limits walking.
- Earlier, milder cases are assessed for lymph drainage procedures instead.
The options, as set out by the ISL:
- Debulking: removes thickened skin and fibrous tissue in severe, long-standing cases.
- Lymphatic liposuction: removes excess fat in non-pitting lymphoedema.
- Lymphovenous anastomosis: joins lymph vessels to small veins so lymph can drain; it is most effective early, before the lymph vessels are badly damaged.
- Lymph node transfer: moves healthy lymph nodes to the swollen limb.
Is there surgery for filaria leg swelling in India?
Yes. Debulking and liposuction are used for late filarial lymphoedema, the same way as for other causes. Surgery removes tissue, not the underlying lymph damage, so daily hygiene and compression continue afterwards.
How are skin infections and wounds on a swollen leg prevented?
By keeping the skin intact and treating every entry point early. WHO notes that acute attacks in filarial lymphoedema are usually triggered by bacterial skin infection, and each attack makes the swelling worse. The same is true of cellulitis in any swollen leg.
- Treat fungal infection between the toes promptly.
- Clean small cuts and keep them covered until healed.
- Get same-day care for a red, hot, painful leg with fever.
- Ask about preventive antibiotics if attacks keep coming back; the ISL recommends them when attacks recur despite good compression.
Our page on Cellulitis of the foot explains the warning signs and treatment.
Next step
Bring any Doppler reports, blood tests and a photo of the leg in the morning and evening. Book a swollen leg review to find the cause before choosing treatment.
This page is for education and is not a substitute for examination. The comparison table is a general guide, and the surgical indications are Dr. Ashutosh Shah's practice, based on the ISL consensus. Sudden swelling of one leg, especially with pain or breathlessness, needs emergency care first.
FAQs
Is filarial swelling still seen in Gujarat?
Yes, though new infection has fallen sharply. A 2017 study from the southern districts of the state found microfilaria rates below 1 percent after years of mass drug treatment. People infected years ago can still have lymphoedema, which needs lifelong skin care whether or not the parasite is still present.
Can lymphoedema be cured with tablets?
No. The 2023 International Society of Lymphology consensus says drugs such as benzopyrones are not a substitute for compression therapy, and long-term diuretics are discouraged. Antibiotics treat infections and anti-filarial tablets treat active infection, but neither removes swelling that is already present.
Does a swollen leg need a compression stocking for life?
For lymphoedema, usually yes. The lymph vessels do not recover on their own, so swelling returns when compression stops. For vein swelling, the need may fall once the vein problem is treated. The stocking class and fit are reviewed as the leg changes, not prescribed once.
What is the difference between lymphoedema and a DVT?
A DVT is a clot in a deep vein. It causes sudden swelling of one leg, often with pain and warmth, and is an emergency. Lymphoedema builds over months and is usually painless. Any swollen leg doctor in Bhavnagar or elsewhere will send sudden swelling for an urgent Doppler scan.
Can surgery reduce leg size permanently?
Surgery can remove tissue that compression cannot shift, such as excess fat and fibrous tissue, and that reduction can last. But lymph drainage remains poor, so compression and skin care continue after surgery. Without them, swelling tends to build up again over time.
Why does my swollen leg keep getting red and hot?
Most often it is an infection, called cellulitis, or in filarial swelling an acute attack. Bacteria enter through cracked skin, fungal infection between the toes or a small cut. Each attack damages more lymph vessels, so see a doctor the same day and treat the entry point.
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