Caring for Your Lower Limb Immobilisation

If you have been fitted with a plaster cast, splint or supportive boot for a lower leg injury, it is important to understand the possible risks while your leg is immobilised. Keeping your leg still for long periods increases the risk of developing a Deep Vein Thrombosis (DVT), which is a blood clot in a deep vein. Knowing the warning signs and when to seek urgent medical attention can help keep you safe during your recovery.

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Why Does Immobilisation Increase the Risk?

Normally, the muscles in your legs help pump blood back towards your heart when you walk and move.

When your leg is immobilised:

• Blood flows more slowly through the veins.
• Reduced movement increases the chance of a blood clot forming.
• The risk is higher after an injury requiring a cast, splint or supportive boot.

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What Is a Deep Vein Thrombosis (DVT)?

A DVT is a blood clot that develops in a deep vein, most commonly in the leg.

In some cases, part of the clot can break away and travel to the lungs, causing a Pulmonary Embolism (PE). This is a medical emergency and requires immediate treatment.

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Symptoms of a DVT

Seek urgent medical advice if you notice:

• Pain or tenderness in your calf or thigh.
• Swelling in your calf or thigh.
• Warmth or redness in the affected leg.
• Changes in the colour of your skin.

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Symptoms of a Pulmonary Embolism (PE)

Call 999 immediately if you develop:

• Sudden shortness of breath.
• Chest pain.

A pulmonary embolism can be life-threatening and requires emergency treatment.

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When to Seek Medical Help

If you develop symptoms of a DVT, attend your nearest Accident and Emergency Department as soon as possible.

If you need urgent medical advice but your condition is not life-threatening, call NHS 111.

For less urgent concerns, contact your GP or local pharmacist.

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Stay Safe During Your Recovery

Most people recover without developing a blood clot, but it is important to remain aware of the warning signs while your leg is immobilised. If you notice any new or worsening symptoms, seek medical advice promptly.