Compression stockings do help varicose veins, but primarily by managing symptoms like aching, swelling, and heaviness rather than reversing or curing the condition. They work by squeezing the leg in a graduated pattern, tightest at the ankle and looser toward the knee or thigh, which pushes blood upward and reduces pooling in damaged veins. That said, current medical guidelines actually recommend procedures over long-term stocking use for most people who are candidates for treatment.
How Compression Improves Blood Flow
Varicose veins develop when the one-way valves inside your leg veins stop closing properly, allowing blood to flow backward and pool. This stretches the vein walls, creating the bulging, twisted appearance you see at the surface. Compression stockings counteract this by narrowing the vein diameter from the outside. When the vein is squeezed smaller, the valve flaps can meet again, and blood moves faster toward the heart instead of sitting stagnant in the lower leg.
Studies using ultrasound to measure blood flow confirm this effect. When compression stockings are applied, blood velocity through the major veins behind the knee and in the upper thigh increases significantly. This faster flow reduces the stasis that causes swelling, skin changes, and that familiar end-of-day heaviness. The pressure gradient, stronger at the ankle and lighter higher up, essentially mimics what your calf muscles do when you walk, giving your circulation a passive assist even when you’re sitting or standing still.
What Compression Can and Cannot Do
Compression is effective at reducing day-to-day symptoms. Most people notice less swelling, less aching, and less fatigue in their legs. For people who aren’t candidates for a procedure due to other health conditions or limited mobility, stockings can be a reasonable long-term management strategy.
What compression cannot do is prevent varicose veins from getting worse over time or stop new ones from forming. A review of 11 randomized trials and 12 additional studies found that while compression improved symptoms, the evidence does not support the idea that stockings slow the progression of venous disease or prevent recurrence after treatment. The underlying valve damage remains, and once a vein is stretched, compression won’t shrink it back to its original size.
Guidelines Favor Procedures Over Stockings
The 2023 guidelines from the Society for Vascular Surgery, American Venous Forum, and American Vein and Lymphatic Society are clear on this point: for patients with symptomatic varicose veins who are candidates for treatment, the strong recommendation is to pursue a vein procedure rather than rely on long-term compression stockings. The guidelines also suggest against requiring a three-month trial of compression therapy before approving a procedure, a practice some insurers previously mandated.
Compression therapy is still recommended as primary treatment in specific situations: when someone’s mobility or medical conditions make a procedure risky, or when the patient simply prefers a conservative approach. In those cases, stockings serve as either a trial period or ongoing management. After a vein procedure such as thermal ablation, guidelines suggest wearing compression for at least one week to reduce pain during recovery.
Compression Levels and Types
Not all compression stockings are the same. They’re measured in millimeters of mercury (mmHg), the same unit used for blood pressure. Over-the-counter options typically provide 15 to 20 mmHg, which is enough for mild swelling or tired legs from prolonged standing. Medical-grade stockings start at 20 to 30 mmHg and go up to 40 mmHg or higher, and these require a prescription or professional fitting for varicose veins with significant symptoms.
Knee-high stockings are the most commonly prescribed for varicose veins below the knee. Thigh-high versions or full pantyhose-style garments are used when veins extend higher. The choice depends on where your problem veins are located. Proper fit matters enormously. Stockings that are too loose won’t provide adequate pressure, and ones that are too tight can dig into the skin, restrict circulation, or cause irritation. Fitting involves measuring the circumference of your ankle, the widest part of your calf, and for thigh-length stockings, your upper thigh at the crease of the buttock.
How to Wear Them Effectively
The standard guidance is to put compression stockings on first thing in the morning, before your legs have had a chance to swell, and wear them until bedtime. Your legs are at their least swollen after a night of lying flat, so this is when the stockings slide on most easily and when they’ll do the most good throughout the day. If your legs are already swollen when you try to put them on, lying down with your feet elevated for 15 to 20 minutes beforehand can help.
Getting medical-grade stockings on and off is genuinely difficult, especially at higher compression levels. This isn’t a minor complaint. Studies on compliance consistently find that patients struggle with donning, and many stop wearing them altogether because of the effort involved. Assistive devices can make a real difference. Stocking donners, which are frame-like tools that hold the stocking open so you can step into it, and silk liner socks that reduce friction have both been shown to improve willingness to stick with compression therapy. One redesigned donning device was tested with at least 90 patients and most reported meaningfully easier use compared to putting stockings on by hand.
A few practical tips that help: rubber dishwashing gloves give you a much better grip on the fabric. Turn the top half of the stocking inside out, slide it over your foot, then unroll it up the leg rather than trying to pull it straight up. Avoid lotions or oils on your legs before putting them on, as these make the fabric slip and bunch.
When Compression Is Not Safe
Compression stockings are not appropriate for everyone. The most important contraindication is significant peripheral arterial disease, a condition where the arteries bringing blood to your legs are narrowed or blocked. In that case, adding external pressure can reduce blood supply to the skin and tissue enough to cause damage.
An international consensus statement on compression safety identifies specific thresholds: compression is contraindicated when the systolic ankle pressure falls below 60 mmHg or when the ankle-brachial pressure index drops below 0.6. These are measurements your doctor takes by comparing blood pressure at your ankle to blood pressure in your arm. If you have diabetes, a history of peripheral artery disease, or poor circulation in your feet, getting this checked before starting compression therapy is important.
Other situations that call for caution include active skin infections on the legs, severe heart failure where extra fluid returning to the heart could be dangerous, and nerve damage that prevents you from feeling if the stockings are too tight. Skin irritation, redness, or numbness while wearing stockings are signs the fit is wrong or compression isn’t right for you.
Compression for Travel and Prevention
One area where compression has strong evidence is preventing blood clots during long flights. A Cochrane review of airline passengers found that compression stockings reduced the odds of a symptomless deep vein thrombosis by roughly 90%. For low-risk travelers, this translates to a drop from about 10 clots per 1,000 passengers down to 1 per 1,000. For higher-risk passengers, the reduction goes from 30 per 1,000 to about 3 per 1,000. If you already have varicose veins and fly frequently, wearing knee-high compression stockings during flights is one of the simplest things you can do to lower your clot risk.