Oedema

Oedema is the build-up of fluid in body tissues, producing visible swelling most often in the legs, ankles, and feet. It is not a disease in itself but a sign of an underlying process, heart, kidney, or liver problems, venous insufficiency, or prolonged sitting on a long-haul flight. In tropical climates across Southeast Asia the heat alone can cause mild ankle swelling in otherwise healthy people, so the context matters a great deal.

Medicines used to treat Oedema

Lasix

Furosemide

40 · 100mg

Utilized to alleviate oedema to support fluid balance.

From $0.31 / tablet View

Aldactone

Spironolactone

25 · 100mg

Formulated to alleviate fluid retention, indicated to support blood pressure management and target mineralocorticoid receptors.

From $0.29 / tablet View

Diamox

Acetazolamide

250mg

Developed to manage glaucoma and oedema to alleviate pressure and reduce fluid retention.

From $0.54 / tablet View

Frumil

Amiloride, Furosemide

40/5mg

Utilized to alleviate fluid retention, balancing potassium levels by combining a potassium-sparing agent with a loop diuretic.

From $0.19 / tablet View

Esidrix

Hydrochlorothiazide

12.5 · 25mg

Indicated to manage fluid retention through increased sodium and water excretion in the kidneys.

From $0.55 / tablet View

Demadex

Torsemide

10 · 20mg

Utilized to manage oedema associated with heart failure to support reduction of fluid retention.

From $0.48 / tablet View

Hygroton

Chlorthalidone

6.25 · 12.5mg

Utilized to mitigate excess fluid retention and intended to support the management of essential hypertension.

From $0.49 / tablet View

What drives the fluid build-up

The kidneys regulate how much salt and water the body holds, and anything that disrupts that balance can tip fluid out of blood vessels and into surrounding tissue. Heart failure is one of the commonest culprits: a weakened heart raises backpressure in the venous system, pushing fluid outward. Kidney disease reduces the body’s ability to excrete sodium. Cirrhosis lowers albumin levels, which normally keeps fluid inside vessels. Certain blood pressure medicines, corticosteroids, and anti-inflammatory drugs can also contribute.

Localised oedema, one swollen leg, a puffy eyelid, points toward a local cause such as a deep-vein thrombosis, lymphatic blockage, or local infection rather than a systemic one.

Diuretics: the main treatment approach

Most oedema treatment centres on diuretics, which increase urine output and pull excess fluid out of the tissues. Furosemide (a loop diuretic) works quickly and is often the first choice for significant fluid overload linked to heart or kidney conditions. Torsemide is a longer-acting loop diuretic that some patients tolerate better. For milder cases or as a complement to loop diuretics, hydrochlorothiazide reduces reabsorption of salt in the kidney tubules. Spironolactone and amiloride are potassium-sparing options particularly useful when loop or thiazide diuretics alone cause low potassium, and spironolactone is a first-line choice for oedema caused by liver cirrhosis. Acetazolamide has a narrower role, mainly in altitude-related oedema and some specialist settings. Heart and blood pressure conditions that lead to oedema are covered in the heart and blood pressure category.

Self-care and when to get help

Mild dependent swelling often responds to elevating the legs above heart level for 30 minutes a few times a day, reducing sodium intake, and wearing compression stockings. Staying well-hydrated (counterintuitive as it sounds) helps the kidneys work efficiently.

Seek medical attention promptly for sudden swelling in one leg with calf pain, swelling that comes with breathlessness or chest tightness, or pitting oedema that appears rapidly over hours, these can indicate a clot or acute heart failure that needs urgent assessment.