Compression socks are recommended for people with chronic venous disorders, those at risk of blood clots, workers who stand or sit for long stretches, long-haul travelers, and athletes recovering from intense exercise. They work by applying graduated pressure to the lower legs, pushing blood back toward the heart and preventing fluid from pooling in the ankles and calves. While they’re available over the counter, certain groups benefit far more than others.
People With Chronic Venous Disease
The strongest case for compression socks is in people with chronic venous insufficiency, a condition where the valves in leg veins don’t close properly, allowing blood to flow backward and pool. Symptoms include heaviness, tension, increasing pain, and visible swelling that worsens through the day, especially in warm environments or after prolonged sitting and standing. Compression stockings are considered a standard, first-line treatment for all stages of venous disease, from early symptoms to advanced skin changes like eczema and hardened tissue around the ankles.
For people who have had venous leg ulcers (open wounds caused by poor circulation), compression therapy is especially critical. The 2025 clinical practice guidelines from the Society for Cardiovascular Angiography and Interventions issued a strong recommendation for compression in patients with venous ulcers, noting that higher-strength compression may be more effective. After an ulcer heals, wearing compression socks long-term is one of the most reliable ways to prevent it from coming back.
People With or at Risk of Blood Clots
If you’ve been diagnosed with a deep vein thrombosis (DVT), immediate compression is recommended to reduce pain and swelling. In clinical studies, patients with acute DVT who wore compression stockings and walked had significantly less calf swelling within the first nine days compared to those on bed rest without compression. Pain scores dropped faster as well.
Compression socks are also used after a DVT resolves to help prevent post-thrombotic syndrome, a chronic condition where the affected leg stays swollen, painful, and prone to skin changes long after the clot itself is treated.
Long-Haul Travelers
Sitting in a cramped airplane seat for hours slows blood flow in the legs, raising the risk of symptomless blood clots. Compression socks reduce that risk by roughly 90%. In a pooled analysis of over 2,600 airline passengers, 47 of those who flew without compression socks developed a symptomless DVT compared to just 3 who wore them. In practical terms, the risk drops from about 10 per 1,000 long-haul passengers to about 1 per 1,000.
This applies mainly to flights of four hours or longer. The benefit is greatest for people with additional risk factors like obesity, recent surgery, use of hormonal birth control, or a personal history of clots, but the data shows protection even in otherwise healthy travelers.
Workers Who Stand or Sit All Day
Nurses, hairdressers, retail workers, teachers, surgeons, and anyone else who spends long shifts on their feet are at higher risk for occupational leg swelling. Studies in healthcare workers found a direct correlation between hours worked and the amount of swelling and symptoms that developed. Research in hairdressers showed similar patterns.
Compression stockings consistently reduced lower-limb swelling in these populations. In one comparative study, they were the only intervention that effectively reduced occupational edema. Even when the measurable volume reduction was modest, workers reported relief from pain and that heavy, tired feeling in the legs. An international consensus statement recommended compression stockings for all professionals at increased risk of occupational leg swelling.
Desk workers aren’t exempt. Prolonged sitting creates many of the same circulation problems as prolonged standing. If your legs feel heavy or your ankles look puffy by the end of a workday, compression socks may help regardless of whether you sit or stand.
Athletes Recovering From Hard Training
The evidence on compression socks during exercise is mixed. Some studies show improved time to exhaustion, while others show no meaningful difference in race times. Where the data is more consistent is in recovery after exercise.
In one study of adults performing maximal exercise, recovery markers were 35% to 42% lower at 24 hours and 40% to 61% lower at 48 hours when participants wore compression socks compared to going without. Reviews of research in athletic populations have found consistent reductions in muscle soreness, delayed-onset muscle soreness, and markers of inflammation. Two studies in trained runners found that wearing compression socks improved 5K performance when a second run was done just one hour after the first, suggesting faster recovery between sessions. The practical takeaway: compression socks likely help you bounce back faster rather than run faster during a single effort.
Pregnant Women
Varicose veins and leg swelling are extremely common during pregnancy. In 70% to 80% of women who develop varicose vein problems, symptoms appear during the first trimester, often within two to three weeks of conception. The symptoms can include pain, night cramps, numbness, tingling, heaviness, itching, and throbbing.
Compression stockings are frequently recommended by obstetricians for these symptoms, though the clinical evidence is surprisingly thin. One trial of 35 pregnant women found no significant difference in lower leg volume between compression stockings and rest alone. That said, the trial was small, and many clinicians still recommend them based on the well-established benefits in non-pregnant populations with similar venous symptoms. If your legs ache and swell during pregnancy, compression socks are low-risk and may provide symptom relief even if the formal evidence hasn’t caught up.
People With Lymphedema
Lymphedema causes persistent swelling, usually in an arm or leg, when the lymphatic system can’t drain fluid properly. It can result from cancer treatment, surgery, infection, or genetic conditions. During the maintenance phase of lymphedema management, after initial treatment has reduced the swelling, compression stockings are considered the single most important intervention for keeping swelling under control long term.
Who Should Not Wear Them
Compression socks are not safe for everyone. The clearest contraindication is severe peripheral artery disease, where the arteries supplying the legs are already narrowed. Applying external pressure to legs that aren’t getting enough blood flow can cause tissue damage and non-healing wounds. An international consensus statement identifies specific cutoffs: compression stockings should not be used when ankle blood pressure is below 60 mmHg or toe pressure is below 30 mmHg. Even in milder arterial disease (identified by an ankle-brachial index below 0.9), the effect on blood supply should be carefully monitored.
Other contraindications include severe heart failure, severe diabetic neuropathy where sensation in the feet is lost (because you wouldn’t feel skin damage developing), and confirmed allergy to the stocking material. Serious complications like skin death or nerve damage are rare when compression is used correctly and contraindications are respected, but they do happen when these conditions are overlooked.
How Long to Wear Them Each Day
There’s no single answer. Most people who wear compression socks for venous conditions put them on in the morning and take them off at bedtime. The swelling and pooling that compression treats happens while you’re upright, so nighttime wear is generally unnecessary unless specifically advised. For situational use, like a long flight or a 12-hour nursing shift, you wear them for the duration of that activity. Athletes typically wear them during and for several hours after training. Some brands market overnight wear, but for most people, giving your skin a break while you sleep makes sense.