Varicose Veins and Compression Stockings: A Plain-English Guide
If a doctor has mentioned compression stockings to you, or you have started reading about varicose veins after catching sight of your own legs in a mirror, this page is meant to make the topic make sense. Plain language, no sales pressure, and a clear line between what a doctor decides and what a sock company can honestly tell you.
The short version, up front: compression is a well-established part of how doctors manage varicose veins, but the pressure class matters, and that class is a medical decision. Everyday compression socks like ours sit below the medical classes. For some people that is exactly right. For others it is not enough, and we would rather say so here than sell you the wrong thing.
What varicose veins actually are
Veins carry blood back toward the heart. In your legs that means uphill, against gravity, and the veins manage it with two pieces of equipment: the calf muscles squeezing them with every step, and small one-way valves inside that stop blood from sliding back down between squeezes.
When those valves stop closing properly, some blood pools instead of moving on. The vein stretches under the extra volume, and over time it becomes the rope-like, bulging, blue-green vein people recognise as varicose. Spider veins are the same idea in much smaller surface vessels — thin red or purple lines, usually cosmetic rather than symptomatic.
Why valves fail is mostly out of your hands: family history is the single biggest factor, followed by age, pregnancy, being on your feet for a living, and body weight. It is not caused by crossing your legs, and it is not a sign you did something wrong.
Where compression comes into it
The logic is mechanical. If the vein wall is stretched and the valves are not sealing, gentle pressure from outside narrows the vein slightly, which helps the remaining valve function work better and supports the calf pump while you are upright.
This is why compression is standard in vein clinics worldwide, and why your doctor may raise it before, after, or instead of a procedure. What compression does not do is repair a failed valve or make an existing varicose vein disappear. Nothing you pull on in the morning can do that — removing or closing a damaged vein is what procedures like sclerotherapy, laser ablation and surgery are for.
So the honest framing is: compression is about managing how your legs feel through the day and supporting them while you are upright. It is not a cure, and any brand that tells you otherwise is telling you something they cannot back up.
The part that confuses everyone: mmHg classes
Compression is measured in millimetres of mercury — mmHg — at the ankle, where the garment squeezes hardest. Higher number, firmer squeeze. Roughly, the ladder looks like this:
| Range | Usually described as | Typically used for |
|---|---|---|
| 8–15 mmHg | Light support | Mild tiredness, desk days, general wear |
| 15–25 mmHg | Everyday / over-the-counter | Long shifts, travel, all-day standing — this is our range |
| 20–30 mmHg | Medical class I | Often what doctors specify for diagnosed varicose veins |
| 30–40 mmHg | Medical class II | More advanced venous disease, post-procedure, lymphoedema |
| 40+ mmHg | Medical class III | Specialist use, prescribed and fitted |
Read that table honestly before you buy anything from us. If your doctor said 20–30 or 30–40 mmHg, our socks are not what they meant, and wearing a lighter class instead of a prescribed one is not a substitute. Buy the class you were told to buy, from a medical supplier, and get it fitted.
Where everyday 15–25 mmHg does make sense: you have visible veins but no diagnosis and no symptoms beyond legs that feel tired and heavy by evening; or you have been told your veins are cosmetic and mild; or your doctor said something like "a bit of compression wouldn't hurt" without specifying a class. In those situations an over-the-counter sock you will actually keep on all day beats a medical-grade one that sits in a drawer because it is too much work to put on.
When to see a doctor rather than shop
Book an appointment, and do not treat socks as the first step, if you have:
- Pain, aching or throbbing over a vein, especially if it is new
- A vein that is hard, hot, red or tender to touch
- Skin changes near the ankle — darkening, thickening, dryness or itching that will not settle
- Any open sore or ulcer near the ankle, however small
- Swelling in one leg only, particularly with calf pain — this needs same-day attention
- Bleeding from a vein
- Veins that are getting visibly worse month by month
Also worth a conversation if you are pregnant, diabetic, or already being treated for a circulation condition — not because compression is dangerous, but because the right class and the right timing depend on things only your doctor can see.
What people get wrong about wearing them
Putting them on too late
Compression works best when you get it on before the leg has filled up — first thing in the morning, ideally before you are fully upright. Waiting until evening means fighting the sock onto an already swollen leg, which is both harder and less useful.
Wearing them to bed
Lying flat, your legs drain without help. Unless a doctor told you to sleep in compression, take it off at night. We covered the full routine in how long to wear compression socks.
Assuming tighter is better
It is not. A sock too tight for your leg bunches at the calf and creates a tourniquet effect above the widest point — the opposite of the graduated profile the design depends on. Firm and even beats aggressive.
Keeping a pair long past its life
Elastic fibres fatigue. A pair worn daily loses its knit over months, and a compression sock that has gone slack is just a sock. Wash cool, skip fabric softener — it coats the elastic — and air dry or tumble low.
Getting the size right, because this is where it usually goes wrong
Compression sizing runs on calf circumference, not shoe size. When the two disagree, the calf decides — plenty of people have a size-9 foot on a 25-inch calf. This matters more with vein issues than anywhere else, because a band that digs at the widest part of the calf is exactly the pressure pattern you do not want.
- Measure in the morning, before the leg has changed through the day.
- Sit, foot flat, knee at about 90 degrees.
- Wrap a soft tape around the widest part of the calf, usually the upper third.
- Snug against the skin, not compressing it.
- Measure both legs, size to the larger one.
| Size | Calf circumference | Shoe size (US) |
|---|---|---|
| S/M | 12–15 in · 30–38 cm | M 5–8.5 · W 5.5–9 |
| L/XL | 15–22 in · 38–56 cm | M 8–12 · W 8.5–13 |
| XXL | 22–24 in · 56–61 cm | M 12–14 · W 13–15 |
| 2XL–5XL (Extra Wide Calf) | 19–29 in · 48–74 cm | 11.5 – 14+ |
Past 24 inches, do not try to stretch XXL into service — the wide calf range is knitted wider from the start, with the foot scaled up too. Between two sizes, size up.
What people ask us
Real questions from our support inbox, quoted as patterns rather than as individuals — no names, no invented stories.
"My doctor said compression but didn't say what strength."
Go back and ask, especially if you have a diagnosis. It is a thirty-second question and it decides whether an over-the-counter sock is appropriate at all. If the answer is 20–30 mmHg or higher, buy that class from a medical supplier.
"Will these make my veins go away?"
No. Nothing worn on the outside of the leg removes a damaged vein. That is what procedures are for. Compression is about how the leg feels through the day.
"I had sclerotherapy and was told to wear compression afterwards."
Follow the clinic's instructions exactly — they will have specified a class and a number of days or weeks. Post-procedure compression is a medical instruction, not a comfort choice.
"Can I wear them if the veins are just cosmetic?"
Yes, that is squarely what everyday 15–25 mmHg is for, particularly if you also stand or sit for long stretches.
Frequently asked questions
Do compression stockings help varicose veins?
Compression is a standard part of how doctors manage varicose veins, working by supporting the leg from outside while you are upright. It does not repair valves or remove existing veins. The pressure class should come from your doctor if you have a diagnosis.
What mmHg is best for varicose veins?
That is a medical decision, not a shopping one. Doctors commonly specify 20–30 mmHg for diagnosed varicose veins. Our socks are 15–25 mmHg, which is the everyday over-the-counter range and sits below that class.
Are compression socks the same as compression stockings?
The terms get used interchangeably. In practice "stockings" often means thigh-high or medical-grade garments, and "socks" usually means knee-high. Height and pressure class are what actually matter, not the word.
Can compression stockings make varicose veins worse?
A correctly sized garment should not. A too-small one can bunch and band at the calf, which is uncomfortable and defeats the graduated design. If a sock digs, leaves deep ridges or causes numbness, it is the wrong size — stop wearing it and re-measure.
Should I wear them all day?
Most people wear compression from morning to evening and remove it at night, unless a doctor advised otherwise.
Do they help spider veins?
Spider veins are surface vessels and largely cosmetic. Compression will not clear them; it may make legs feel more comfortable if you are also on your feet a lot.
If everyday compression is what you need
Measure your calf first — and if you have a diagnosis, confirm the class with your doctor before ordering anything.
Calf up to 24 inches → shop the regular range (S/M · L/XL · XXL)
Calf 19–29 inches, or a wider foot → shop Extra Wide Calf (2XL–5XL)
15–25 mmHg graduated compression · seamless toe · Buy 3 Get 3 Free · free shipping · 90-day money-back guarantee.
This article is general information about everyday comfort wear and is not medical advice. The Well Socks products are not medical devices and are not a substitute for compression prescribed by a healthcare professional. They do not diagnose, treat, cure or prevent any condition, including varicose veins or venous disease. If you have pain, skin changes, an ulcer, one-sided swelling, or a diagnosed vein condition, speak to your doctor.