Persistent leg pain affects a surprisingly large portion of the population. CDC data from 2019 shows that 36.5% of U.S. adults reported lower limb pain in the previous three months, with rates climbing steeply by age: about 21% of adults under 30, but over 50% of those 65 and older. The cause varies widely, from poor circulation and nerve damage to spinal problems and simple lifestyle factors. Understanding the pattern of your pain, when it strikes, and what makes it better or worse is the fastest way to narrow down what’s going on.
Poor Circulation: Veins and Arteries
Two of the most common vascular causes of chronic leg pain work in opposite directions. One involves blood not getting out of your legs efficiently; the other involves blood not getting in.
Chronic venous insufficiency (CVI) happens when the valves inside your leg veins stop working properly. Instead of pushing blood back up to your heart, the damaged valves let it pool in your lower legs and feet. The result is a heavy, full feeling in your legs, swelling around your ankles (especially by the end of the day or after standing for a while), burning or tingling sensations, and nighttime leg cramps. Over time, CVI can cause visible skin changes: reddish-brown discoloration, leathery texture, itching, and in advanced cases, open sores that are slow to heal. If your legs feel worst after long periods of standing or sitting and improve when you elevate them, venous insufficiency is a strong possibility.
Peripheral artery disease (PAD) is the opposite problem. Fatty deposits build up inside your arteries, narrowing the channel that delivers oxygen-rich blood to your leg muscles. The hallmark symptom is called intermittent claudication: cramping or aching in your calves, thighs, or hips that starts when you walk or climb stairs and stops within a few minutes of resting. The harder you push, the worse the pain. Your muscles simply can’t get enough oxygen to keep up with demand. At rest, the reduced blood flow is usually enough, so the pain disappears. PAD is more common in smokers, people with diabetes, and those with high blood pressure or high cholesterol.
Nerve Damage and Neuropathy
If your leg pain feels like burning, “pins and needles,” or shooting electric sensations, the problem may be in your nerves rather than your muscles or blood vessels. Peripheral neuropathy, the most common form, typically starts in the feet and works its way upward. Your legs may feel painful even from a light touch, or you might notice numbness alternating with sharp pain. Balance problems, changes in the way you walk, and muscle weakness in the feet can develop as the condition progresses.
Diabetes is the leading cause. Prolonged high blood sugar and elevated triglycerides damage both the nerves themselves and the tiny blood vessels that supply them with nutrients. But diabetes isn’t the only culprit. Thyroid disorders, kidney disease, and low vitamin B12 levels can all cause neuropathy, which is why blood tests are a standard part of the workup. The pain tends to be constant or near-constant, often worse at night, and doesn’t follow the clear activity-rest pattern you see with arterial disease.
Spinal Problems That Radiate Into the Legs
Your legs can hurt even when the real problem is in your lower back. Lumbar spinal stenosis occurs when the spinal canal narrows due to age-related changes like bone spurs or herniated discs. That narrowing puts pressure on the nerves that travel from your spine down into your legs, producing pain or cramping in one or both legs. The signature pattern is pain that flares when you stand for a long time or walk, and eases when you sit down or lean forward. Bending forward opens up the spinal canal slightly and takes pressure off the nerves, which is why people with stenosis often feel better pushing a shopping cart (slightly hunched) than walking upright.
This type of leg pain is easy to confuse with PAD because both hurt during walking and improve with rest. The key difference is positioning: spinal stenosis improves when you sit or bend forward, while PAD improves simply by stopping the activity, regardless of posture.
Muscle and Soft Tissue Causes
Not all chronic leg pain points to a serious underlying condition. Myofascial pain syndrome involves tight knots of muscle fiber called trigger points. These knots can form in any muscle, and they often cause referred pain, meaning you feel the ache somewhere other than where the trigger point actually is. A trigger point in your hip or upper thigh, for example, might send pain radiating down toward your knee or calf. The pain is typically dull and persistent, worsening with activity or pressure on the affected area.
Prolonged sitting or standing also takes a direct toll. When you sit for hours, blood pools in your lower legs because your calf muscles aren’t contracting to push it back upward. This creates burning or cramping, mainly in the calves, that mirrors early venous insufficiency. Over time, a sedentary lifestyle can shorten your hip flexors and hamstrings, creating persistent tightness and aching that feels like it never fully goes away. If your pain worsens on days you sit the most and feels better after movement, this is a likely contributor.
Nutritional Deficiencies and Medications
Low magnesium levels cause muscle spasms, cramps, and numbness in the hands and feet. If your “leg pain” is really frequent, involuntary cramping, especially at night, a mineral imbalance is worth investigating. Potassium deficiency produces similar cramping. Both are common in people who take certain blood pressure medications, don’t eat enough fruits and vegetables, or lose electrolytes through heavy sweating.
Cholesterol-lowering medications called statins are another frequently overlooked cause. About 5% of people taking statins experience muscle pain, typically described as soreness, tiredness, or weakness in the legs. For most, it’s mild but persistent enough to be bothersome. For a smaller number, the discomfort is severe enough to interfere with daily activities. If your leg pain started after beginning a cholesterol medication, that timing is worth mentioning to your doctor. In extremely rare cases (a few per million users), statins cause serious muscle breakdown, but for most people the issue is manageable by adjusting the dose or switching to a different medication.
How to Tell What’s Causing Your Pain
The pattern of your pain is the single most useful clue. Pain that worsens with walking and stops with rest suggests arterial disease. Pain that worsens with standing or walking but improves when you sit or bend forward points toward spinal stenosis. Heaviness and swelling that builds throughout the day and improves with elevation suggests venous insufficiency. Burning, tingling, or numbness that’s constant or worse at night leans toward nerve damage.
Where the pain shows up matters too. Pain in both legs equally often points to a systemic cause like neuropathy, venous disease, or a nutritional deficiency. Pain in just one leg, particularly if that leg is swollen, red, or warm, warrants faster evaluation.
Symptoms That Need Urgent Attention
Most chronic leg pain develops gradually and isn’t an emergency, but certain combinations of symptoms signal something more dangerous. Sudden swelling, redness, and warmth in one lower leg can indicate a blood clot. Calf pain that starts after prolonged sitting, such as a long flight or car ride, raises the same concern. Swelling in both legs accompanied by difficulty breathing may point to a heart or kidney problem. A leg that turns pale or feels unusually cool suggests a sudden drop in blood flow. Any of these deserve same-day medical evaluation rather than a wait-and-see approach.