Are varicose veins dangerous? What you really need to know

Varicose veins are often brushed off as a cosmetic concern, but is that the whole story? For many people, these enlarged, twisted veins are more than just a visible annoyance. They can cause symptoms like pain, swelling, and even itching — and in some cases, they may point to more serious circulatory issues. So, are varicose veins dangerous? And what does it mean if they start to itch?

Let’s unpack the risks, symptoms, and when to seek medical advice.

What causes varicose veins in the first place?

Varicose veins develop when the tiny valves in your leg veins stop working properly. Instead of moving blood efficiently back to your heart, the blood pools in the veins, causing them to stretch and become visible just beneath the surface of the skin.

They're more common in older adults, pregnant women, and people who stand for long periods. Genetics, obesity, and hormonal changes also play a role. While UK Vein Care frequently sees patients with visible veins and discomfort, each case is different — and understanding your specific risk is important.

When are varicose veins considered dangerous?

In many cases, varicose veins are harmless — uncomfortable, yes, but not life-threatening. However, there are situations where they can become medically concerning.

Here’s when you should pay closer attention:

• Swelling, redness, or heat around the vein may suggest inflammation or infection.
• Sudden pain or tenderness in the leg could indicate a blood clot, such as superficial thrombophlebitis or deep vein thrombosis (DVT).
• Skin changes like ulcers, hardening, or discolouration around the ankles can be signs of chronic venous insufficiency — a more advanced stage of vein disease.

In rare cases, untreated varicose veins can lead to complications like bleeding from the vein, especially if the skin becomes very thin over time.

If you’re new to varicose veins and want to understand the basics, we cover the main causes and symptoms in this Facts about varicose veins article.

Are itchy varicose veins dangerous?

Are itchy varicose veins dangerous — or just annoying? Itchiness around varicose veins is surprisingly common. It’s typically caused by a condition called venous stasis dermatitis, where poor blood flow leads to skin inflammation.

Here’s the catch: while itchiness itself isn’t usually dangerous, it can signal that your vein disease is progressing. Constant scratching can also lead to skin damage, increasing the risk of infections or even ulcers in severe cases.

If you're dealing with persistent itchiness, tightness, or dryness of the skin around your varicose veins, it’s a good idea to speak to a vein specialist. These signs might indicate worsening venous insufficiency — a condition that we’ve covered in more detail in our guide on chronic venous insufficiency and its symptoms.

What can happen if varicose veins go untreated?

Not everyone needs immediate treatment, but ignoring symptoms long-term isn't wise. Over time, untreated varicose veins can lead to:

• Increased discomfort and heaviness in the legs
• Skin changes, including thickening, pigmentation, or ulceration
• Blood clots, which can be serious if they travel to deeper veins
• Spontaneous bleeding, especially in older adults with fragile skin

Even if your veins aren’t currently causing major issues, early assessment can help you stay ahead of complications.

So… should you worry?

If your varicose veins are itchy, sore, or changing in appearance — it’s worth paying attention. While they aren’t always dangerous, they can lead to complications if left unmanaged.

At UK Vein Care, we often see people who wait until discomfort becomes too hard to ignore. But catching things early allows for easier, less invasive treatments — like laser therapy or foam sclerotherapy.

If you're curious about how varicose veins are treated, we’ve put together an overview of how to get rid of varicose veins, covering everything from lifestyle changes to medical procedures.

Final thoughts

So, are varicose veins dangerous? Sometimes — especially if they’re itchy, painful, or come with other symptoms. While most cases are manageable, it’s always best to listen to your body. If something feels off, trust your instincts and get it checked.

For patients in the UK, UK Vein Care offers gentle and effective treatments with long-lasting results. No referral needed — just an appointment to evaluate your situation and explore your options.

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