Why Does the Side of My Calf Hurt When Walking?

Calf pain during walking is a common concern. The calf muscles, primarily the gastrocnemius and soleus, are located at the back of the lower leg and are crucial for movement. Identifying the source of discomfort can help manage the sensation.

Common Causes of Calf Pain

Calf pain during walking often stems from muscle strain. A pulled muscle occurs when fibers are overstretched or torn, often from sudden movements or overstretching. Symptoms include sudden pain, swelling, tenderness, and difficulty tensing the calf or standing on toes.

Muscle cramps are sudden, involuntary contractions causing intense pain. Often linked to dehydration, electrolyte imbalances, or muscle fatigue, maintaining proper hydration can help prevent them.

Delayed onset muscle soreness (DOMS) typically emerges 12 to 72 hours after unaccustomed or intense exercise. It results from microscopic tears in muscle fibers, leading to an inflammatory response. Symptoms include tenderness, stiffness, and reduced range of motion, usually resolving within a few days.

Tendinitis, especially Achilles tendinitis, can cause calf pain. Inflammation of the Achilles tendon, which connects calf muscles to the heel bone, typically results from repetitive stress or overuse. It often manifests as a mild ache in the back of the leg, worsening with activity and improving with rest. Tight calf muscles or inadequate warm-up can contribute.

More Serious Conditions

Less common but more serious conditions causing calf pain require prompt medical evaluation.

Deep vein thrombosis (DVT) involves a blood clot, most often in the leg. Symptoms include swelling, warmth, redness, and tenderness in the calf, with pain worsening when standing or walking.

Compartment syndrome occurs when pressure builds up within a muscle compartment, potentially reducing blood flow. This can cause severe pain, tightness, numbness, or tingling, often exacerbated by movement. Acute compartment syndrome is a medical emergency; chronic forms can be exercise-induced.

Peripheral artery disease (PAD) occurs when narrowed arteries reduce blood flow to the legs. This can lead to pain, cramping, or fatigue in the calves, particularly during walking (claudication). The pain typically subsides with rest.

Nerve compression, such as sciatica, can cause referred pain in the calf. Sciatica results from a pinched nerve in the lower back, causing burning or shooting pain down the leg, sometimes into the calf. Weakness or numbness may also accompany this pain.

When to Seek Medical Attention

Certain symptoms with calf pain warrant immediate medical attention. Seek emergency care for sudden, severe pain, especially with swelling, warmth, or redness in the calf, as these could indicate deep vein thrombosis. Other concerning signs include inability to bear weight or a visible change in skin color.

Consult a healthcare provider if calf pain develops without a clear cause, persists despite rest, or worsens. Calf pain with fever, or severe swelling without apparent injury, should prompt a medical visit. These symptoms can signal serious underlying conditions requiring professional diagnosis and management.

Initial Steps for Relief

For mild calf pain, several self-care measures can help. The RICE method—Rest, Ice, Compression, and Elevation—is a common protocol. Resting the injured leg prevents further damage. Apply ice for 10 to 20 minutes to reduce pain and swelling. Compression with a bandage helps control swelling, and elevating the leg minimizes fluid buildup.

Gentle stretching may provide relief if pain permits. Over-the-counter pain relievers, such as acetaminophen or NSAIDs (e.g., ibuprofen, naproxen), can alleviate pain and inflammation. Ensuring adequate hydration is important, particularly if muscle cramps are suspected, as fluids assist muscle function.