What you need to know about leg ulcers

A leg ulceration is the most severe form of chronic venous insufficiency.  This is referred to as a ‘venous leg ulcer.’  Venous leg ulcers make up 70% of all chronic leg wounds.  Therefore, a venous leg ulcer is much more common than a diabetic or arterial ulcer.  It is caused by long-standing pressure within the leg veins, resulting from 1) venous reflux through faulty valves, 2) a blockage within the deep veins or 3) from the inability to use the calf muscles or a combination.  Venous reflux is the most common cause of a venous leg ulcer.  The increased pressure within the leg veins (we call this venous hypertension) causes an inflammatory response. Inflammation then causes changes in the skin, usually around the ankles (this is where pressure is the greatest).  The inflammatory process will cause the skin around the ankles to become brown or discolored, and eventually, the skin will break open.  The leg wound can be healed by treating the underlying vein condition.  Venous leg ulcers can also be prevented by early intervention with non-invasive procedures.  If you have signs of chronic venous insufficiency (such as skin discoloration around the ankles) you should address your underlying vein condition to prevent the skin from breaking open.

What is chronic venous insufficiency?

Chronic venous insufficiency (CVI) is an inflammatory condition caused by long standing, untreated venous reflux disease.  Commonly, venous reflux disease causes a collection of symptoms such as leg swelling, heaviness, fatigue and varicose veins. But, over time, when blood is no longer circulating properly in the leg veins, skin changes can also appear. When skin changes appear, this is termed, chronic venous insufficiency (CVI). Venous stasis is another term used for this condition.   Chronic inflammation from CVI causes the skin around the ankles to darken, become dry, itchy, and firm. In severe cases, the skin can start to break down and ulcerate. The ulcer (wound) occurs in the inner or outer ankle and is also referred to as a stasis ulcer or venous ulcer.

Venous stasis skin changes associated with venous insufficiency include:

• Darkening of the skin along the ankles
• Itching and dry skin around the ankles (venous eczema)
• Development of wounds around the ankles, called venous leg ulcers

How are leg ulcers treated? 

Venous leg ulcers, depending on the severity, can be healed with a combination of correction of the underlying venous reflux, wound care clinic referral, and compression therapy. A detailed ultrasound will determine what specific treatment is needed depending on where the underlying reflux lies (for example, in the saphenous veins, perforator veins and tributaries). Deep vein reflux is also present in many individuals with ulcers.

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