Leg Swelling and Hidden Venous Disease

How Venous Reflux Causes Leg Swelling

Healthy veins push blood upward toward the heart. When the valves fail:

1. Blood pools in the leg
2. Pressure increases within the veins
3. Fluid leaks into surrounding tissues
4. Swelling develops, especially around the ankles and lower legs

This swelling often:

• Worsens throughout the day
• Is more noticeable after long periods of standing or sitting
• Improves with leg elevation or overnight rest

Common Symptoms of Hidden Varicose Veins

You may have venous disease if you experience:

• Swollen ankles or lower legs
• Heaviness or tightness in the legs
• Aching or throbbing discomfort
• Tired legs at the end of the day
• Burning or cramping sensations
• Relief when legs are elevated
• Symptoms worse in hot weather
• Discomfort after long periods of standing or sitting

These symptoms are especially common in people whose jobs involve long hours on their feet, such as healthcare workers, teachers, retail staff, and hospitality workers.

Why Swelling Should Not Be Ignored

Persistent leg swelling is not just uncomfortable — it can be a sign of progressive venous disease.

If left untreated, venous reflux can lead to:

• Skin discolouration around the ankles
• Eczema or itchy skin
• Hardening of the skin
• Increased risk of venous ulcers

Early diagnosis allows treatment before permanent skin damage occurs.

How Is Venous-Related Leg Swelling Diagnosed?

The most effective way to identify venous disease is through a specialist consultation and duplex ultrasound scan.

This scan:

• Assesses blood flow in the leg veins
• Identifies leaky valves
• Detects hidden varicose veins
• Helps guide the most appropriate treatment

Many patients are relieved to finally understand the cause of their symptoms after months or years of unexplained swelling.

Is There a Solution?

Yes. Venous disease is highly treatable, even when veins are not visible.

Depending on the findings, treatment options may include:

• Endovenous ablation (such as radiofrequency ablation)
• Foam sclerotherapy
• Compression therapy
• Lifestyle and activity guidance

Modern treatments are minimally invasive, effective, and usually performed under local anaesthetic.

Frequently Asked Questions

Can I have varicose veins without seeing them?

Yes. Many patients have venous reflux in deeper veins that are not visible on the skin but still cause swelling, pain, and heaviness.

Why do my legs swell more at the end of the day?

Prolonged standing or sitting increases pressure in faulty veins, allowing fluid to leak into surrounding tissues. Elevating the legs helps drain this fluid.

Is leg swelling always due to venous disease?

Not always. Swelling can have multiple causes, which is why proper assessment and ultrasound scanning are important to identify the exact reason.

Will compression stockings cure the problem?

Compression stockings can relieve symptoms but do not correct faulty vein valves. Treating the underlying reflux offers longer-term relief.

What happens if venous reflux is left untreated?

Symptoms may worsen over time and can progress to skin damage, discolouration, and in advanced cases, leg ulcers.

Is treatment safe if I don’t have visible veins?

Yes. Treatments are guided by ultrasound, allowing precise treatment of veins beneath the skin.

When Should You Seek Assessment?

You should consider a specialist venous assessment if:

• You have ongoing leg swelling
• Your legs feel heavy, tired, or painful daily
• Symptoms improve when you elevate your legs
• Your work involves long periods of standing or sitting
• You have swelling without visible veins

A simple consultation and scan could provide clear answers — and a straightforward solution.

Understanding the Cause Is the First Step

Leg swelling is not something you have to “just live with.” Hidden venous disease is common, under-recognised, and highly treatable.

With the right assessment, we can identify the cause of your symptoms and offer a safe, effective solution that improves comfort, mobility, and quality of life.