Compression stockings: what to know
Compression stockings are the most commonly recommended non-procedural tool in vein care. They are used during the conservative management phase before treatment, after vein procedures to support healing, and in certain situations for long-term symptom management. Many patients have questions about how they work, which type is appropriate, and how long they need to wear them. This page covers the key points.
What are compression stockings?
Compression stockings are specially constructed elastic garments designed to apply graduated pressure to the leg. Graduated compression means the pressure is strongest at the ankle and decreases as it moves up the leg. This gradient counteracts the direction of venous pressure: it provides the most support where pressure buildup is greatest (the foot and ankle) and less where the vein already has more assistance from nearby muscles (the calf and thigh).
How compression works
When valves fail, blood pools in the lower leg and raises internal venous pressure. Compression stockings apply external counter-pressure to the leg that reduces the diameter of the superficial veins, supporting the valve function from the outside. This reduces the amount of blood pooling, decreases swelling, and alleviates aching and heaviness. The key limitation is that this effect is present only while the stocking is worn. Compression stockings manage the symptom of pooling but do not repair the valve or close the affected vein. When the stocking is removed, the underlying venous insufficiency is still present.
Compression levels explained
| Compression level | Pressure range | Typical use |
| Mild (support hose) | 8-15 mmHg | Preventive use, mild fatigue, long travel days |
| Moderate (Class 1) | 15-20 mmHg | Mild varicose veins, spider veins, pregnancy prevention |
| Medical grade (Class 2) | 20-30 mmHg | Symptomatic varicose veins, post-procedure, moderate venous insufficiency |
| Medical grade (Class 3) | 30-40 mmHg | Advanced venous insufficiency, post-thrombotic syndrome |
| Prescription grade (Class 4) | 40-50 mmHg | Severe lymphedema, recurrent ulcers; requires physician supervision |
Most patients with symptomatic varicose veins or following vein procedures use Class 2 (20-30 mmHg) medical-grade compression. Your specialist will prescribe the appropriate level based on your condition and procedure.
When compression stockings are recommended
Compression stockings are used in several specific situations in vein care:
- Before treatment (conservative management phase). Some insurance plans require documented compression use for a defined period before authorizing ablation procedures.
- After vein procedures. Compression supports treated vein closure, reduces bruising, and is worn for a period after treatment as directed by your specialist.
- During pregnancy. Medical-grade graduated compression is safe and recommended for managing varicose vein symptoms and lower leg swelling.
- Long travel or extended inactivity. Flights longer than three to four hours are a recognized risk period for venous pooling.
- Occupational use. For people whose work requires prolonged standing, daily compression reduces symptom burden during the workday.
Learn what to expect at your first consultation.
Compression after treatment: duration
Compression after vein treatment is worn for a period after treatment as directed by your specialist. The duration is specific to your procedure type and the extent of treatment performed. Your post-procedure instructions will specify exactly what is needed. Your specialist's guidance takes priority over any general estimates.
Getting properly fitted
Medical-grade compression stockings should be properly fitted to work effectively and to be comfortable enough to wear consistently. Our team can assist with fitting at your clinic appointment. Key considerations include the correct size (measured at specific leg circumferences), the appropriate length (knee-high vs thigh-high), and the correct compression class for your situation.
If you have questions about compression stockings and how they fit into your vein care plan, our team can answer them at your consultation. See our full recovery guide for more on compression after procedures. Read how to prepare for your vein procedure. Learn more about varicose veins and when compression is part of the management plan.
Long-term use of compression
After the post-procedure compression period is complete, most patients are not required to wear compression stockings on a daily basis indefinitely. However, many patients benefit from compression in specific situations: during long air travel (flights lasting more than three to four hours are a well-established risk period for venous pooling and superficial clot formation); during long days of standing at work; during pregnancy if they become pregnant again; and during prolonged illness or bed rest that limits leg movement. Keeping medical-grade compression stockings available for these situations is a practical form of vein health maintenance that most patients find easy to incorporate.
Caring for your compression stockings
Medical-grade compression stockings are durable but require proper care to maintain their compression properties. Hand washing in cool water with mild soap and air drying is recommended. Machine washing on a gentle cycle in a mesh laundry bag is acceptable for most stocking materials, but heat-drying degrades the elastic fibers and reduces compression over time. Most compression stockings retain their medical-grade compression for approximately three to six months of regular wear. At that point, the compression level has likely decreased enough to warrant replacement. Our team can advise on replacement timing at your follow-up appointments.
Frequently asked questions
Can I buy compression stockings at the drugstore, or do I need a prescription?
Mild compression support stockings (8-15 mmHg) are available over the counter and do not require a prescription. Medical-grade compression (20-30 mmHg and above) for treatment of venous insufficiency or post-procedure care is typically prescribed at a specific compression class by your vein specialist. Prescription-grade stockings are more precisely calibrated and properly fitted.
My compression stockings are uncomfortable. What should I do?
Compression stockings that are difficult to put on or uncomfortable during wear are often the wrong size, the wrong length, or the wrong compression class. Our team can assess your fit at your next clinic visit. A properly fitted stocking is firm but should not cause pain, dig in at the top, or leave significant marks on the skin.
Do I need to wear compression stockings forever after vein treatment?
No. Compression is worn for a period after treatment as part of the healing process. After that period, compression use is situational rather than daily: during long travel, during prolonged standing days, or during pregnancy if applicable. Your specialist will advise you on long-term compression use at your follow-up appointments.
Are compression stockings safe during pregnancy?
Yes. Medical-grade graduated compression stockings are safe and commonly recommended during pregnancy for managing varicose vein symptoms and lower leg swelling. Maternity-specific styles are available that accommodate a growing abdomen.
What is the best way to put on compression stockings?
The most effective technique is to turn the stocking inside out down to the heel, place your foot into the heel pocket, then gradually pull the stocking up the leg, smoothing it as you go rather than pulling from the top. Donning devices are available for patients with limited hand strength or mobility. Our team can demonstrate the technique at your clinic appointment and recommend a device if needed.
