Deep Vein Thrombosis (DVT) is a condition where a blood clot forms in a deep leg vein, most commonly in the calf or thigh.

This can cause a partial or full blockage of the flow of blood in this area – which can cause concern and a sufferer may seek medical attention to relieve discomfort. At this stage DVT is not life threatening, but it has the potential to become dangerous if complications occur. Symptoms of DVT are:

• localised leg pain
• enlargement of the superficial veins
• skin discolouration
• warm skin
• swelling in the affected leg

When does DVT become dangerous?
Deep Vein Thrombosis becomes particularly dangerous if the blood clot that occurred in the deep leg vein begins to move through the body. The clot can dislodge itself from the leg vein and move upwards to attach itself to the vein that sits between the lungs and the heart. This can cause a Pulmonary Embolus and result in a life threatening condition.

Who is Likely to Develop DVT?
Clot formation tends to occur when the blood flow is restricted in a vein. The decreased flow and poor circulation can have a number of causes. No one is immune to the risk of DVT however there are individuals considered "high-risk".

You may be at risk if you:

• have had recent physical damage to a deep leg vein* (from surgery or a serious knock)
• undergo long-haul car or plane travel (over four hours duration)
• have heart disease*
• have Diabetes*
• have had a recent heart attack or stroke*
• have other conditions such as liver disease, infections and some cancers*
• are over 40 years of age
• are pregnant
• are overweight
• are under four feet tall (who cannot put their feet on the floor), and over six feet tall (who are more cramped in seating positions)
• are on the contraceptive pill
• have varicose veins or a history of circulation problems*

* Those with one or more of these conditions (marked with an asterisk) should consult medical advice before travelling and choosing appropriate compression hosiery.