Venous hypertension: what to know

Leg veins rely on one-way valves and calf-muscle movement to push blood upwards. If valves become weak or a vein is obstructed, blood can collect in the lower limbs. Pressure then builds in the small vessels and surrounding tissues. Common effects include ankle or lower-leg swelling, heaviness, aching, itching, visible veins and skin that becomes darker, firmer or more fragile.

Venous hypertension is different from high pressure in the arteries. A clinician may ask about previous clots, vein problems, standing time, mobility and swelling on one or both sides. Heart failure, chronic kidney disease and obesity can add to fluid retention, so the wider health picture matters.

Arrange an assessment if swelling persists, returns regularly or is accompanied by skin changes or a sore that heals slowly. Walking and ankle movements activate the calf muscles; raising the legs when resting may also ease pooling. Avoid sitting or standing still for long periods, and protect dry or fragile skin from knocks.

Compression garments can help some people, but they are not suitable for everyone. A clinician should check circulation and advise on the right type and fit before you use them. Do not apply a tight garment over an unexplained, painful swelling. Treatment may also address a clot, a vein problem or another source of fluid retention.

Seek urgent medical assessment for sudden swelling, warmth, redness or pain in one leg, particularly if it follows travel, immobility or an operation. Call emergency services for chest pain, sudden breathlessness, coughing blood, fainting or new weakness and speech difficulty. These features can signal a clot or another emergency rather than routine venous pressure.

What is causing my venous pressure or swelling? Do I need an ultrasound or circulation check? Are compression garments safe for me? Which exercises, skin-care measures and medicines fit my other health conditions?