Last reviewed: June 1, 2026 · Compression Socks Canada Team
Chronic venous insufficiency, often shortened to CVI, is one of the most common reasons Canadians end up looking at compression stockings. The condition develops gradually — sometimes over years — and the symptoms can be easy to dismiss: a heavy feeling at the end of the day, ankles that swell by dinner, faint spider veins around the knee, or a familiar ache after a long shift on your feet. By the time many people start searching for answers, the underlying problem has been quietly progressing for a while.
This guide pulls together what current vascular guidance says about CVI and the role graduated compression plays in day-to-day management. It is not medical advice. CVI sits on a spectrum that ranges from mild cosmetic concerns to advanced skin changes and ulceration, and the right approach for any individual should be confirmed with a physician or vascular specialist.
What is chronic venous insufficiency?
Veins in the legs carry blood back toward the heart against gravity. Tiny one-way valves inside the veins, paired with the squeezing action of the calf and foot muscles, keep that return flow moving upward. In CVI, those valves stop closing properly, blood pools in the lower leg, and pressure inside the veins rises. Over time, the elevated pressure stretches the vein walls, distorts surrounding tissue, and changes how fluid is exchanged between blood vessels and skin.
Vascular societies use a staging tool called CEAP to describe how far CVI has progressed. Stages range from C0 (no visible signs) through C6 (active venous ulcer). Spider veins and small varicose veins live in the early stages. Visible swelling, skin discolouration, eczema-like changes, and ulcers sit further along the scale. According to the Merck Manual, persistent venous hypertension is the driver behind those later changes.
Who is more likely to develop CVI?
CVI is common. Estimates vary, but research summarized by the National Library of Medicine suggests that a sizeable share of adults experience some degree of chronic venous disease, with prevalence increasing with age. Frequently noted contributors include:
- A previous deep vein thrombosis (DVT) that damaged valve function.
- Family history of varicose veins or venous disease.
- Pregnancy, especially across multiple pregnancies.
- Occupations that involve long hours of standing or prolonged seated travel.
- Higher body mass index, which increases venous pressure.
- Hormonal influences, which can affect vein wall elasticity.
None of these are guarantees of CVI on their own. They simply raise the probability that pressure is being placed on a venous system that may not be coping as well as it once did.
Common symptoms most people notice first
Early CVI rarely announces itself dramatically. Adults often describe:
- Heaviness or fatigue in the legs that builds through the day.
- Mild ankle or calf swelling that is more pronounced in the evening.
- Cramping or restless sensations at rest.
- Itching around the inner ankle.
- Visible spider veins or small bulging veins along the calf or behind the knee.
Later signs include darker pigmentation around the lower shin (haemosiderin staining), inflamed skin patches that look like eczema, hardened tissue (lipodermatosclerosis), and slow-healing wounds. Any new wound that does not heal in a reasonable timeframe is a reason to see a clinician promptly.
How graduated compression fits into care
Graduated compression stockings apply firm pressure at the ankle and gradually less pressure moving up the leg. That gradient is the entire point: it nudges blood and lymphatic fluid upward, supports the calf muscle pump during each step, and reduces the volume of pooled blood inside the dilated veins. The result, when the right product is worn consistently, is a reduction in the day-to-day symptoms that drive most CVI complaints — the swelling, the heaviness, the aching by 4 p.m.
Compression does not repair damaged valves. It is best thought of as a daily strategy that lowers the pressure load while a person addresses the contributing factors and pursues any medical treatments their physician recommends. The Mayo Clinic describes compression stockings as a foundational step in conservative management for venous disease, often used alongside lifestyle changes, weight management, exercise, and, when needed, procedural treatments.
Choosing a compression class for CVI
Compression is measured in millimetres of mercury (mmHg). The standard medical classes seen in Canada are:
- 15-20 mmHg (mild): Often used for mild swelling, tired legs, mild varicose veins, travel, and early or preventive use. Browse 15-20 mmHg compression socks.
- 20-30 mmHg (moderate): A common starting point for diagnosed CVI, more pronounced varicose veins, post-sclerotherapy support, and active swelling. Browse 20-30 mmHg compression socks.
- 30-40 mmHg (firm): Typically reserved for more advanced venous disease, post-thrombotic syndrome, severe edema, and venous ulcer management. Browse 30-40 mmHg compression socks.
The right class is a decision for a physician, vascular specialist, or trained fitter, especially when CVI is more advanced or other conditions like peripheral artery disease may be present. Higher pressure is not automatically better. The objective is the right pressure for the diagnosis and the individual leg.
Length, fit, and material considerations
Most CVI cases can be managed effectively with knee-high stockings, which cover the calf where venous reflux is usually most active. Thigh-high or pantyhose options are used when swelling extends above the knee or when a clinician identifies reflux higher up the saphenous system. Length should always reach the area where symptoms occur, but not push pressure higher than necessary.
Fit matters more than brand. A correctly sized stocking sits flat against the leg, with the ankle band landing exactly at the ankle joint and the calf landing one finger-width below the knee crease. Stockings that bunch, roll, or pinch a section of skin are the wrong size or wrong style. Authorized Canadian retailers can help measure ankle, calf, and (for thigh-highs) thigh circumferences, plus leg length, before recommending a size.
Material affects daily wearability. Sea-island cotton blends feel softer and breathe well. Microfibres are smoother under dress trousers. Sheer hosiery suits formal contexts. For longevity and consistent compression, replacing stockings every three to six months for daily wearers is a common recommendation across major manufacturers.
Brand options Canadians shop most often
Compressionsocks.ca is an authorized Canadian retailer of several manufacturers used in vascular clinics across the country. The two most established brands in the venous health space are:
- Sigvaris: a Swiss-headquartered specialist with extensive medical-grade ranges in 15-20, 20-30, and 30-40 mmHg.
- JOBST: a long-standing medical compression brand with strong support for varicose veins, post-procedural care, and severe CVI.
Both brands publish their own measurement guides and produce options for men, women, and seniors across a range of fabrics, toe styles, and skin tones. The varicose veins collection and the poor circulation collection are useful starting points if you want to filter by condition rather than brand.
Daily habits that work alongside compression
Compression stockings carry more of their weight when combined with simple daily habits. Vascular guidelines repeatedly highlight a small set of behaviours:
- Move the calf pump. Short walks, ankle pumps, and calf raises through the day mobilise blood that would otherwise pool. The Society for Vascular Surgery highlights calf-pump activation as a cornerstone of conservative CVI care.
- Elevate the legs. Lifting the legs above heart level for 15 to 20 minutes a couple of times a day relieves pressure quickly.
- Manage weight where possible. Lower body weight reduces venous load.
- Hydrate and limit prolonged standing. Long static postures are the worst combination for venous return.
- Skincare. Gentle moisturisers keep the lower-leg skin barrier intact, which is important once pigmentation or dryness appears.
When CVI is more advanced, vascular specialists may recommend procedures such as endovenous thermal ablation, foam sclerotherapy, or surgery. Compression remains relevant before and after most of those treatments.
When compression stockings are not the right tool
There are situations where compression should be avoided or used only under direct medical supervision. These typically include moderate to severe peripheral artery disease, decompensated heart failure, untreated cellulitis or infected skin, advanced peripheral neuropathy with significant sensation loss, and any leg where pulses cannot be felt. A clinician should review the leg before starting compression for the first time, especially in older adults with overlapping conditions.
Putting it together
Chronic venous insufficiency is a manageable condition for most Canadians who recognise it early and act steadily. Graduated compression stockings take a quiet, mechanical approach to the underlying problem: they cut down venous pressure so the body can spend less energy fighting gravity and more energy healing tissue, reducing swelling, and getting through the day comfortably. Paired with movement, elevation, and any treatments a physician recommends, daily compression is one of the most consistent levers people have to slow CVI progression.
If you are starting out, a 20-30 mmHg knee-high stocking from a reputable brand is the most common first choice and a sensible place to begin a conversation with a clinician or fitter. If you have already been told you have CVI and have not been wearing compression daily, that single change often makes the biggest difference in how the legs feel by evening.
Frequently asked questions
Can compression stockings reverse chronic venous insufficiency?
No. Compression manages symptoms, reduces venous pressure, and slows progression. It cannot rebuild damaged valves. Procedural treatments handle specific underlying anatomy when needed.
How long do I need to wear them each day?
Most clinicians recommend wearing graduated compression from the time you get out of bed until you go back to bed. The legs are smallest in the morning, which makes morning the easiest time to put them on.
How often should I replace my compression stockings?
For daily wearers, every three to six months is a common manufacturer recommendation. Elastic fibres relax with washing and stretching, which reduces the actual pressure delivered.
Should I wear them at night?
Generally no, unless a clinician specifically recommends it. Venous pressure is much lower when the legs are horizontal, so the compression is not doing the same job overnight.
Are 30-40 mmHg stockings safer than 20-30 mmHg?
Not automatically. Higher pressure can be harder to don, less comfortable, and is not appropriate for everyone. The right class depends on the diagnosis, the individual leg, and any other conditions present.
Related reading
- Managing edema with compression socks
- Combatting spider veins and varicose veins with compression socks
- Do compression socks help with circulation?
Information in this article is intended for general education. It is not a substitute for medical advice from a qualified clinician. If you are unsure whether compression stockings are right for you, speak with a physician or a certified compression fitter before starting.
