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Why Does My Knee Hurt When I Bend It? Common Causes Explained
Kneeling down to tie a shoe. Climbing a flight of stairs. Getting up from a low chair after a long meeting. These are the
Medically Reviewed by
Dr. Paul Hanna, DO, RPVI
Board Certified Vascular Surgeon
Compression stockings are usually the first thing anyone hears about when they’re told they have varicose veins. Buy a pair, wear them daily, and the problem gets managed. That advice isn’t wrong, but it isn’t the whole story either.
Stockings genuinely help a lot of patients feel better. They don’t fix the underlying vein. Understanding that distinction, what compression can realistically do and where its limits are, is the difference between reasonable expectations and frustration a few months in.
Varicose veins are the swollen, twisted, rope like veins you can see bulging just under the skin, usually in the legs. They form when the tiny one way valves inside your veins stop working correctly, so blood that should be moving up toward your heart instead pools and backs up.
That pooling raises pressure inside the vein, and the vein wall stretches and bulges in response. Experts don’t always know the exact reason a given person’s valves weaken, though genetics, pregnancy, age, and long stretches of standing or sitting all raise the odds. We’ve broken down the full list of what causes varicose veins in more depth elsewhere, and we treat the condition directly through our varicose vein treatment program.
Varicose veins are also more common than most people realize. They show up more often in women, frequently appearing or worsening after pregnancy or menopause as hormone shifts affect vein wall elasticity. Family history matters too. If a parent had noticeable varicose veins, your own odds of developing them climb significantly.
Occupation plays a bigger role than most patients expect as well. Jobs that keep you standing or walking for most of the day, retail, healthcare, teaching, and food service among them, show up again and again in people who eventually develop symptomatic varicose veins.
Compression stockings use graduated pressure, meaning the squeeze is strongest at your ankle and gradually loosens as it moves up toward your knee or thigh. Clinical guidelines put that minimum ankle pressure at around 14 mmHg, tapering upward.
That gradient does real mechanical work. It compresses the superficial veins near the surface, keeping them from filling with as much pooled blood, and pushes more of that blood into the deeper veins where it can move back toward your heart more efficiently. The result is less venous pressure and less swelling in your lower leg.
Worth knowing before you shop for a pair. There isn’t one universal standard for rating compression stockings across every manufacturer, so a “medium” label on one brand’s packaging doesn’t always mean the exact same mmHg as another brand’s “medium.” Checking the actual pressure number printed on the box, not just the marketing label, avoids confusion when you’re comparing options.
There’s solid evidence behind the symptom relief piece. A patient survey covering more than a thousand stocking wearers found 71 percent reported their condition improved, with 89 percent noticing less heaviness and 84 percent less swelling. Those aren’t marketing numbers. They’re published outcomes.
Compression also holds up well against doing nothing at all. Clinical trial data shows people wearing compression report meaningfully fewer heavy or tired legs than people who get no treatment, along with less cramping and ankle swelling. For day to day comfort, especially if you’re on your feet for work, that difference is real and worth having.
Beyond symptom relief, compression supports a few other jobs worth mentioning. It can help existing venous ulcers heal by improving circulation to the area, and it’s commonly used to lower the risk of blood clots in situations like long flights or recovery after certain procedures. Those benefits are separate from, but related to, its role in managing varicose vein symptoms specifically.
Here’s the part that surprises a lot of patients. A 2024 clinical review in the Cleveland Clinic Journal of Medicine states plainly that there is insufficient evidence to support compression stockings as the primary treatment of varicose veins. They manage symptoms. They don’t reverse the damaged valves causing the problem.
No amount of consistent stocking use will make an existing varicose vein disappear or shrink on its own. The vein itself only gets addressed through a procedure like sclerotherapy or ablation. If your goal is eliminating the visible vein rather than managing how your legs feel, stockings alone won’t get you there.
Even when stockings work well on paper, most people don’t wear them the way they’re prescribed. One clinical review found compliance rates as low as 37 percent, largely because patients find them uncomfortable or a hassle to put on every morning.
That gap between what compression can do in a controlled study and what actually happens in daily life is worth sitting with. A treatment that works well only when used consistently, but gets skipped two or three days a week, delivers a fraction of the benefit the research describes, which partly explains why some patients feel like stockings “don’t work” when the real issue is inconsistent use.
Larger studies back that up. In one, only 28 percent of patients wore their stockings daily as directed, though close to half wore them at least occasionally. Common complaints include tightness, skin irritation, and stockings sliding down through the day, all of which chip away at whether the benefit shown in clinical trials actually shows up in real life.
Compression stockings are sold in pressure ranges measured in mmHg, and picking the wrong one matters. Over the counter stockings generally run under 20 mmHg and work fine for people who are pregnant or spend long hours on their feet without a diagnosed vein condition.
For diagnosed varicose veins, the typical prescribed range runs from 20 to 30 mmHg, which requires a provider’s guidance to fit correctly. Higher pressure isn’t automatically better. It’s harder to put on, more likely to cause skin irritation, and should only be used under medical direction rather than picked off a shelf based on symptom severity alone.
A stocking that’s too tight, too loose, or bunched at the ankle doesn’t just fail to help, it can actively cause problems. Skin irritation, discomfort, and in rare cases nerve or soft tissue damage have all been linked to poorly fitted compression garments.
Getting properly measured, typically at a medical supply store or your provider’s office, makes a real difference in both comfort and results. Trained staff measure your ankle, calf, and sometimes thigh circumference to match you with the right size, and they’ll usually walk you through how to put the stockings on and take them off without rolling or bunching the fabric.
If your stockings wrinkle, bunch, or slide throughout the day, that’s usually a sign the fit or size needs adjusting rather than a reason to give up on compression altogether. Replacing a pair once the elastic loosens matters too. Stretched out stockings quietly stop delivering the pressure they’re supposed to, even if they still look fine.
Compression isn’t automatically safe for everyone with leg pain or swelling. If you also have peripheral artery disease, meaning reduced blood flow from narrowed arteries rather than just vein trouble, compression can actually make that circulation problem worse.
This is exactly why we don’t recommend guessing at your own diagnosis or grabbing compression socks off a shelf before being evaluated. A quick check of your circulation before starting compression therapy protects you from a treatment that helps one condition while quietly worsening another.
Stockings work best as one piece of a broader approach rather than a standalone fix. Elevating your legs when you can, staying active instead of sitting or standing still for hours, and managing your weight all support the same goal of keeping blood moving efficiently through your legs.
Compression also plays a useful supporting role around procedures, not just as an alternative to them. Patients who wear compression stockings for a week or two after treatments like ablation tend to see better results and faster recovery, which is a different job than trying to use stockings as the entire treatment plan on their own.
If you’ve worn properly fitted stockings consistently for a few months and your legs still ache, swell, or feel heavy by the end of the day, that’s a reasonable point to talk about additional treatment. The same goes for veins that are cosmetically bothersome, since stockings were never going to make those disappear.
Certain warning signs deserve faster attention than a routine follow up. Bleeding from a varicose vein, skin that’s turned red, warm, or discolored, or new pain and swelling all warrant an evaluation soon rather than waiting it out. We also treat related conditions like reticular veins, which sometimes get confused with true varicose veins but respond to a different approach.
When conservative management isn’t cutting it, the next step usually isn’t surgery in the traditional sense. Minimally invasive options like sclerotherapy and vein ablation close off the problem vein directly, addressing the source rather than just managing symptoms around it.
Studies on ablation specifically show meaningful cosmetic improvement, and outcomes tend to be even better when patients wear compression stockings for about a week afterward and stay active during recovery. It’s a good example of compression and procedural treatment working together rather than one replacing the other entirely.
Varicose veins are often an early sign of a broader issue called chronic venous insufficiency, where your leg veins struggle to consistently move blood back up against gravity. Left unaddressed, this can progress over time, which is part of why we treat vein disease as a whole picture rather than one isolated symptom.
Knowing that context helps explain why a “cure” isn’t really the right expectation to set with any conservative treatment, compression included. The goal with stockings is management and comfort. The goal with a procedure is addressing the vein itself.
Before recommending compression, a procedure, or anything else, Dr. Paul Hanna and our vascular team start with a proper exam, often including ultrasound imaging to see exactly which veins are affected and how the blood is actually flowing. That picture determines whether stockings alone make sense or whether you’re a better candidate for a procedure from the start.
Skipping that step and self treating with over the counter stockings means you might be managing symptoms for months without ever addressing what’s actually driving them, or worse, using compression when an underlying arterial issue makes it inappropriate.
Ultrasound imaging specifically shows us which veins have failing valves and how severely blood is flowing backward instead of forward, information you simply can’t get from looking at your legs in a mirror. That level of detail is what separates a real treatment plan from guessing based on how bad the bulging veins look on a given day.
If your provider has recommended stockings, getting the most out of them comes down to consistency and proper use. Put them on first thing in the morning before swelling builds up, check for wrinkling or bunching throughout the day, and replace them every few months once the elastic starts to stretch out and lose pressure.
If you find yourself avoiding them because they’re uncomfortable, tell your provider rather than just quietly stopping. A different pressure level, a different style, or a properly remeasured fit often solves the problem, and it’s a far better outcome than months of inconsistent wear followed by frustration that “compression doesn’t work.”
If you’re already wearing compression stockings and not seeing the improvement you expected, or if you’d rather understand your options before committing to daily stockings at all, an evaluation gives you real answers instead of guesswork. Reach out to our team to schedule a consultation and find out what’s actually driving your symptoms.
No. They manage symptoms like swelling, heaviness, and aching, but they don’t reverse the damaged valves or remove the visible vein. Procedures like sclerotherapy or ablation are needed to address the vein itself.
Most patients with diagnosed varicose veins are prescribed stockings in the 20 to 30 mmHg range, though the right level depends on severity and should be determined by a provider rather than chosen off the shelf.
If they’re poorly fitted, they can cause skin irritation or discomfort. More seriously, compression can worsen circulation in people who also have peripheral artery disease, which is why a proper evaluation matters before starting.
Most providers recommend wearing them during waking hours and removing them at night, putting them on first thing in the morning before swelling has a chance to build up.
Discomfort is the top reason. Studies show compliance rates as low as 37 percent, largely due to tightness, difficulty putting them on, and stockings sliding down during the day. A proper fit usually helps.
An evaluation, often including ultrasound imaging, can determine whether a minimally invasive procedure like sclerotherapy or vein ablation would address your symptoms more directly than continuing conservative management alone.
Cleveland Clinic: Varicose Veins, Symptoms, Causes and Treatment
Cleveland Clinic: Compression Therapy, Types and Benefits
Cleveland Clinic Journal of Medicine: Varicose Veins
National Institute for Health and Care Excellence, NCBI Bookshelf: Conservative Management, Varicose Veins in the Legs
Dr. Paul Hanna is a board-certified vascular surgeon with specialized fellowship training in complex vascular interventions and minimally invasive endovascular techniques. He serves as Director of Vascular Surgery and General Surgery at South Florida Multispecialty Medical Group, with over a decade of experience treating vascular conditions affecting the limbs, aorta, and peripheral arterial system.
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