Compression Socks: Benefits and How to Choose
Compression socks apply graduated pressure to help blood flow back up the legs. They can ease tired, swollen feet and lower the risk of clots on long journeys — if you pick the right level.
How they work
Graduated compression socks are tightest at the ankle and loosen up the leg, encouraging blood and fluid to move upward against gravity. This counters the pooling that causes swelling, aching and tired legs after long periods of standing or sitting.
Who benefits
They help people who stand all day, travellers on long flights, pregnant people with swelling, those with varicose veins or mild venous insufficiency, and many athletes who use them for recovery. The NHS uses compression for swelling and to reduce clot risk in at-risk patients.
Compression levels
| Pressure | Typical use |
|---|---|
| 8-15 mmHg | Mild tired/achy legs, prevention, travel |
| 15-20 mmHg | Standing jobs, mild swelling, travel |
| 20-30 mmHg | Varicose veins, moderate swelling (often medical) |
| 30-40 mmHg | Significant venous disease (medical guidance) |
Choosing and fitting
Measure your ankle and calf circumference and leg length to get the right size — too tight can restrict circulation. Knee-high covers most everyday needs. Higher medical-grade levels should be fitted and recommended by a clinician.
Wearing them safely
Frequently asked questions
- What compression level do I need?
- For everyday tired or mildly swollen legs, 15-20 mmHg suits most people; higher medical levels need clinical advice.
- Can I wear compression socks all day?
- Yes, during the day, but remove them at night and stop if they cause numbness, pain or colour changes.
Sources & further reading
- Foot and ankle health, Mayo Clinic
- Foot problems, NHS
- Patient resources, American Podiatric Medical Association (APMA)