Lower leg pain has dozens of possible causes, ranging from overuse injuries and muscle cramps to circulation problems and nerve damage. The most common cause in otherwise healthy adults is simple muscle cramping, which affects roughly half of adults at some point. But persistent or unusual pain often points to something more specific, and the location, timing, and quality of the pain can help narrow down what’s going on.
Shin Splints and Stress Fractures
If your pain runs along the front of your lower leg and started after ramping up physical activity, the most likely culprit is medial tibial stress syndrome, commonly called shin splints. The pain tends to spread across a broad area along the inside or outside of the entire shinbone, and it sometimes improves as you keep exercising. Shin splints are an irritation of the muscle and tissue attached to the bone rather than damage to the bone itself.
A stress fracture is more serious. Unlike shin splints, stress fracture pain is concentrated in one specific spot on the bone, that spot is tender when pressed, and the pain does not improve with continued activity. It typically gets worse over time and may eventually hurt even at rest. If you have localized tenderness directly over the shinbone that persists after resting, that’s a strong signal to get imaging done.
Achilles Tendon Problems
Pain in the back of the lower leg, near the heel or just above it, often involves the Achilles tendon. There are two distinct patterns. Noninsertional tendinitis affects the middle portion of the tendon, a few inches above the heel. Over time, the tendon fibers develop tiny tears, causing swelling and thickening that you can sometimes feel as a bump. Insertional tendinitis occurs right where the tendon attaches to the heel bone and is frequently caused by tight calf muscles placing extra stress on that attachment point. Bone spurs often form at the back of the heel alongside insertional problems.
Both types tend to start as stiffness or mild aching after activity and progress to more constant pain if you keep pushing through it.
Muscle Cramps
Sudden, involuntary tightening of the calf muscle is one of the most common sources of lower leg pain. In a study of nearly 300 primary care patients, over half reported getting leg cramps. They’re especially common at night, in older adults, during pregnancy, and after prolonged standing or exercise. Most cramps resolve on their own within minutes, but frequent or severe cramps can signal dehydration, electrolyte imbalances, or an underlying circulation or nerve issue.
Peripheral Artery Disease
When pain or cramping in the calf reliably shows up during walking and disappears within a few minutes of rest, the pattern points toward peripheral artery disease (PAD). Fatty deposits narrow the arteries supplying the legs, and while resting blood flow is usually sufficient, active muscles can’t get enough. The result is a cramping, aching, or tired feeling in the calf, thigh, or buttock that forces you to stop and rest.
Over time, PAD can worsen. Pain may start occurring at shorter walking distances or even at rest. More advanced signs include cool skin on the affected leg, slow-healing sores, numbness, and changes in skin color. Smoking, diabetes, high cholesterol, and high blood pressure are the primary drivers of the arterial plaque buildup behind PAD.
Deep Vein Thrombosis
A blood clot forming in one of the deep veins of the leg, called deep vein thrombosis (DVT), causes pain, cramping, or soreness that typically starts in the calf. Unlike a muscle strain, DVT usually comes with noticeable swelling in one leg, warmth over the affected area, and a color change in the skin (reddish or purplish).
Risk rises after long periods of immobility: a long flight, bed rest after surgery, or a hospital stay. Age over 60, recent injury or surgery to a vein, and certain genetic clotting disorders (like factor V Leiden) also increase the likelihood. DVT is dangerous because the clot can break loose and travel to the lungs, causing a pulmonary embolism. Sudden shortness of breath, chest pain that worsens with deep breathing, a rapid pulse, or coughing up blood after having leg symptoms are emergency warning signs.
Chronic Venous Insufficiency
If your lower legs feel heavy, achy, or tired, especially toward the end of the day or after prolonged standing, the problem may be in your veins rather than your arteries. Chronic venous insufficiency (CVI) occurs when valves inside the leg veins stop working properly, allowing blood to pool rather than flow back up toward the heart. Symptoms include a full or heavy sensation in the legs, burning or tingling, nighttime cramping, and swelling in the lower legs and ankles that worsens throughout the day. Visible varicose veins and skin changes around the ankles are common as the condition progresses.
Nerve-Related Leg Pain
Pain that shoots down the leg from the lower back, or that comes with numbness, tingling, or weakness, often originates from a pinched nerve root in the spine. This is called lumbar radiculopathy, and when it involves the sciatic nerve, it’s commonly known as sciatica. The specific area of the lower leg affected depends on which nerve root is compressed. The pain is typically sharp, can worsen with coughing or sneezing, and may travel all the way from the buttock to the foot.
Diabetic peripheral neuropathy is another major nerve-related cause. It typically starts in the feet and gradually moves upward into the legs. The sensations are distinctive: burning, tingling (“pins and needles”), numbness, or extreme sensitivity where even a light touch feels painful. Unlike sciatica, which usually affects one side, diabetic neuropathy tends to affect both legs symmetrically. About half of people with diabetes develop some form of neuropathy over time.
Compartment Syndrome
Compartment syndrome is rare but serious. The muscles of the lower leg are enclosed in tight sheaths of tissue, and when pressure inside one of these compartments rises too high, it cuts off blood flow to the muscle and nerves. Acute compartment syndrome usually follows a fracture or crush injury and causes pain that seems far worse than the injury should warrant. The lower leg may feel swollen and unusually firm. Passive stretching of the affected muscles intensifies the pain.
This is a surgical emergency. Treatment needs to happen before the limb shows late signs like pale skin or loss of a pulse, because by that point permanent damage may already be occurring. A chronic, milder version called exertional compartment syndrome can also develop in athletes, causing a tight, aching pressure in the lower leg during exercise that resolves with rest.
How Pain Patterns Point to the Cause
The character and timing of your pain are the most useful clues. Cramping that comes on with walking and stops with rest suggests an arterial blood flow problem. A dull ache and heaviness that builds through the day and improves when you elevate your legs points to a venous issue. Sharp, localized tenderness on the shinbone after increasing your training load suggests a stress injury. Burning or tingling that starts in the feet and creeps upward is characteristic of nerve damage. Sudden one-sided swelling with warmth and color change raises concern for a blood clot.
Pain that wakes you at night, pain at rest that doesn’t respond to basic self-care, swelling in only one leg, or any combination of leg pain with shortness of breath or chest pain all warrant prompt medical evaluation. For pain tied to activity or mild muscle cramps, rest, stretching, and gradual return to exercise resolve most cases within a few weeks.