Compression stockings are special socks that improve blood flow in the leg veins and prevent blood from pooling in the legs. They are woven in such a way so that they are tighter near the feet and gradually become looser as they go up the leg. This steady squeezing of the legs helps blood flow out of the leg veins and back towards the heart. By improving circulation in the veins of the legs, compression stockings can prevent blood clots (deep vein thrombosis) and relieve the symptoms of chronic vein diseases and varicose veins, such as swelling, aching, and pain. Compression stockings may also be labelled as “graduated” or “gradient” stockings.
How are compression stockings used to treat vein disease?
Compression stockings are a simple, inexpensive way to prevent blood clots in the veins of the legs (DVT) and to relieve the symptoms of chronic vein disease. In women who are at risk for deep vein thrombosis (blood clots in the veins), compression stockings can prevent DVT by keeping blood flowing. Blood that sits still is more likely to form clots. In women with chronic vein disease, compression stockings can relieve symptoms such as aching, heaviness, swelling, and pain, and prevent varicose veins from getting worse. Compression stockings are also used to improve blood flow after procedures to treat vein disease, and they can help prevent and heal ulcers (sores) in women with severe vein disease. Compression stockings are often combined with medication to prevent blood clots.
What kinds of compression stockings are available?
Compression stockings come in a variety of styles, strengths, and sizes. The choice of stocking depends on how severe and widespread your vein disease is, and how much compression you need to keep blood from pooling in the legs. Your doctor will measure your legs and tell you which type of stocking is right for you. Stockings are available in a range of colours and styles and look the same as regular hosiery.
The most common type of compression stockings extend from your toes to knees or to your mid-thigh. Pantyhose versions are also available. Stockings come in various strengths, given as a pressure in millimeters of mercury (mm Hg). The higher the number, the stronger they are. Your health care provider will measure your legs to ensure proper sizing and tell you what strength of stockings you should buy.
Lower-strength compression stockings (10-20 mm Hg) are often used to prevent DVT in lower-risk women, and to treat spider veins and swelling caused by mild chronic vein disease. Stronger prescription stockings (20–50 mm Hg or more) may be necessary if you have already had a DVT or are at high risk for one, or if you have severe chronic vein disease.
Who should not wear compression stockings?
Most women with moderate or severe peripheral artery disease (PAD-blood flow problems in the leg arteries) should not wear compression stockings. Because stockings help blood flow up and out of the legs, they can interfere with blood flowing down the legs, making PAD symptoms worse. If you have been diagnosed with PAD, or your ankle-brachial index is less than 1 (a sign of blood flow problems in your leg arteries), ask your doctor if compression stockings are safe for you.
Women with diabetes that has caused nerve problems in the legs (peripheral neuropathy) should not wear compression stockings because they may not be able to notice symptoms of poor blood flow in the legs.
My doctor has told me to wear compression stockings. What should I know?
Because proper fit is necessary for compression stockings to work properly, make sure to ask your health care provider what size and strength of stockings are right for you and purchase the right kind. One study found that one in four patients wear stockings that aren’t the right size, making them either too loose to prevent clots or so tight that they cut off blood flow. Pay special attention if you lose or gain weight or if your amount of leg swelling changes, as you may need a different stocking size.
You should wear the stockings all day, every day, and take them off at night. If you cannot tolerate wearing them all day, you may be instructed to start by wearing them for only a few hours a day. As you become accustomed to the stockings you should gradually wear them for longer each day. Check your stockings regularly to make sure they are not bunching up or pinching your skin at the top, as this can cut off blood flow and actually increase your risk of clots.
Stockings tend to wear out and lose their elasticity after 3 to 6 months and need to be replaced. You can extend the life of your stockings by reading washing instructions carefully – hand washing may help them stay elastic for longer.
The stockings need to be tight to apply pressure to your legs, and putting them on can be difficult. Some tips:
- Put the stockings on first thing in the morning
- If your skin is moist, putting a little cornstarch or talcum powder on your legs may help them slide on easier
- Use rubber gloves to get a better grip on the fabric
- Special devices to help you put the stockings on (called “donning aids”) are available – ask your health care provider for more information if you are having trouble
- Hold the stocking by the top and roll outward and down to the heel
- Slide your foot into the stocking as far as possible, making sure your heel is aligned properly
- Grab the rolled part of the stocking and pull up with both hands until it is in place, being careful not to twist the stocking
- Unroll the stocking a bit more and pull up again until the top of the stocking is in place
- Go over the stocking again, starting at the toes, and pull up until all wrinkles are gone
You should check your legs and feet for signs of blood flow problems at least once a day. If you notice skin that is broken, cool, pale, or purple, or if you experience prolonged numbness or tingling while wearing the stockings, call your doctor. You may need a different size or strength of stocking to maintain healthy blood flow.