Compression Socks: What They Do, and Who They Actually Suit
They are standard kit for nurses and flight crews for a reason. They are also not for everyone, and one group should speak to a GP first.
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Compression socks have moved from a medical supply cupboard into ordinary working wardrobes, particularly among people who spend their shift upright. The mechanism is simple enough to explain properly, which makes it easy to judge whether they are likely to help you.
What graduated compression means
The word that matters is graduated. A proper compression sock is tightest at the ankle and becomes progressively looser up the calf.
That gradient is the whole design. It applies external pressure where blood has furthest to travel back and eases off as it rises, which supports the direction the veins are already trying to move fluid.
A sock that is uniformly tight, or tighter at the top than the bottom, is not doing this and can work against it. A tight band at the top of the calf is the specific thing to avoid.
Why standing workers use them
The problem compression addresses is the one that comes from standing still: reduced venous return, fluid gathering in the lower leg, heaviness and swelling by the end of a shift.
External graduated pressure supports the return that the calf pump would otherwise be handling alone. That is why they are common among nurses, and among cabin crew who are upright and largely static for long periods.
Compression is a substitute for a calf pump that is not getting the chance to run.
The pressure levels
Compression is measured in millimetres of mercury, written mmHg, and sold in bands.
Around 8 to 15 mmHg is light support, widely available, aimed at general tiredness and mild swelling.
Around 15 to 20 mmHg is moderate, the range most commonly used by people who work on their feet.
Around 20 to 30 mmHg and above is firm, and moves into genuinely medical territory. That range is normally used on advice, and getting the fit right matters much more at that level.
Higher is not better. A pressure that is uncomfortable will end up in a drawer.
Who should ask first
This is the part that gets left out of most articles about them, and it is the part that matters.
Anyone with peripheral arterial disease, or any condition affecting the circulation to the legs, should speak to a GP before wearing compression. Applying external pressure to a limb whose arterial supply is already reduced is not a neutral act.
The same applies to anyone with diabetes, particularly with any reduced sensation in the feet. Compression that is too tight or badly fitted can cause damage that is not felt until it is significant.
If you have existing swelling in one leg only, that is a reason to see a GP rather than to buy socks.
Getting them to work
Put them on first thing, before the leg has had a chance to swell. Putting compression on an already swollen leg at teatime is largely closing the gate afterwards.
Measure rather than guessing the size. Compression works through fit, and the sizing is based on limb measurements rather than shoe size.
Replace them. The elastic fatigues, and a stretched compression sock is just a sock.
Priya Raman Priya writes about recovery routines, walking habits and the small changes that make a long day easier. She shares personal experience and general information, never medical advice. More from Priya Raman
