Choosing compression socks: levels, measuring, and getting them on

Compression socks now come in every color. Runners wear them. Nurses wear them. Under the colors, the job has not changed. A well-fitted sock helps your veins push blood back up the leg. The details that make it work are printed on the package. You just need to know how to read them.

Graduated is the whole point

Real compression socks are graduated. The squeeze is strongest at the ankle. It gets looser going up the leg. That upward push helps the veins and the calf muscles move blood. A sock that squeezes the same everywhere is just a tight sock. Worse is a sock that is tightest at the top band. That band can act like a tourniquet. If the package does not say “graduated” and does not list a pressure number, it is fashion, not function.

Reading the mmHg number

Compression strength is measured in mmHg. Match the number to the job:

• 15–20 mmHg is the everyday level. Use it for tired, achy legs, mild swelling, and long flights or car trips.
• 20–30 mmHg is the firm, medical level. It treats bigger swelling, varicose veins, and recovery after hard activity. Doctors also suggest this level after some clot problems. Many people should ask a clinician before starting here.
• 30–40 mmHg and up is prescription-level compression. It treats specific diagnoses and is fitted by a professional. Do not shop for this level on your own.

Higher is not better. The right level is the lowest one that does the job, worn every day.

Measure — do not guess by shoe size

Sizing depends on two numbers. Measure around your ankle at its thinnest point. Measure around your calf at its widest point. Do it in the morning, before any swelling. Then use that brand’s own chart. Charts differ between brands. A sock picked by shoe size cannot give the right pressure. Too loose does nothing. Too tight can harm.

Getting them on (there is a trick)

Many new wearers quit in the first week. These socks are truly hard to put on. Here is the trick. Turn the sock inside out, down to the heel pocket. Put your heel in. Then unroll the sock up your leg. Never yank the top band. Rubber-dotted gloves help you grip the fabric. They save your knuckles and the sock. Smooth out every wrinkle — a wrinkle is a pressure line on your skin. Put them on in the morning. Take them off before bed, unless your doctor says otherwise.

Who should ask first

Compression is very safe for healthy legs. A few situations need a doctor’s OK first. Ask first if you have peripheral arterial disease — blocked leg arteries — because compression can make poor flow worse. Ask first if you have serious numbness in the feet, because you may not feel a bad fit. Ask first if you have heart failure. And ask first for any open wound or skin infection on the leg. Are your feet cold, pale, or painful at rest? Get an exam first, not a sock.

Signs you got it right — and wrong

Right: your legs feel lighter at the end of the day. The evening sock marks fade. The sock feels snug, then you forget it. Wrong: numbness, tingling, toe color changes, pain, or deep grooves at the top band. Take them off. Recheck the size or the level. Compression should feel like support. It should never feel like a fight.