Calf muscle strain
A strain is a tear in the gastrocnemius or soleus muscles, often during running, tennis, squash or jumping. It causes sudden pain, sometimes described as being kicked or hit in the calf, followed by tightness, bruising and difficulty walking or rising onto the toes.
Most strains heal within 2 to 6 weeks with relative rest and progressive loading. See calf strain.
Cramps
Calf cramps are sudden, painful involuntary contractions, often at night or during exercise. They are more common with age, pregnancy, dehydration, some medicines and after unaccustomed activity. Stretching the calf by pulling the toes towards you usually eases them within minutes.
See foot cramps.
Muscle soreness and overuse
- Delayed onset muscle soreness 1 to 3 days after new or intense exercise.
- Increased running, hill training or a change to minimalist shoes.
- Tight, overloaded calves from long periods standing.
- Shin pain on the inner lower leg; see shin pain after running.
Achilles tendon problems
Pain low in the calf or just above the heel, worse first thing in the morning and when starting exercise, suggests Achilles tendinopathy. A sudden snap with difficulty pushing off may be a rupture, which needs urgent assessment.
Nerve-related calf pain
Sciatica from the lower back can cause pain, tingling or numbness in the calf, often with back or buttock pain. Peripheral neuropathy, common with diabetes, causes burning or tingling in the feet and lower legs.
See sciatica stretches and tingling in feet.
Deep vein thrombosis (DVT)
- Throbbing or cramping pain in one leg, usually the calf or thigh.
- Swelling of one leg.
- Warm skin and redness or darkening around the painful area.
- Swollen, hard veins that are sore to touch.
Risk factors include recent surgery or hospital stay, long journeys, immobility, pregnancy and the weeks after birth, hormonal contraception or HRT, cancer, obesity and previous clots. A DVT needs urgent assessment the same day. Chest pain or breathlessness can mean the clot has travelled to the lungs: call emergency services.
Poor circulation (peripheral arterial disease)
Narrowed arteries can cause cramping calf pain when walking that eases after a few minutes of rest, called intermittent claudication. It is more common in smokers, people with diabetes, high blood pressure or high cholesterol. Other signs are cold feet, hair loss on the legs and slow-healing wounds. It needs medical assessment, as it is linked to heart disease and stroke risk.
Other causes
- Bruising from a direct blow.
- Baker’s cyst rupture behind the knee, causing calf swelling.
- Compartment syndrome in athletes, with tightness during exercise.
- Cellulitis, a skin infection with spreading redness and fever.
- Some medicines, such as statins, can cause muscle aches.
Treatment for muscular calf pain
- Relative rest from painful activities for a few days.
- Ice in the first 48 hours, then heat if it feels better.
- Gentle calf stretches against a wall.
- Progressive strengthening: heel raises on two legs, then one.
- Gradual return to running with a walk-run programme.
- A small heel raise in your shoe can ease pain in the early stages.
Preventing calf problems
- Build up running and sport gradually.
- Strengthen the calves regularly with heel raises.
- Warm up before exercise.
- Stay hydrated, especially in hot weather.
- Move regularly during long journeys and after surgery to reduce clot risk.
Where in the calf it hurts
- Upper inner calf: often the gastrocnemius muscle, typical of “tennis leg” strains.
- Deep, lower calf: the soleus muscle, common in runners, worse with bent-knee activities.
- Just above the heel: Achilles tendon.
- Behind the knee: Baker’s cyst or hamstring tendons.
- Whole calf swollen: consider a clot and seek assessment.
When to seek urgent help
- Swelling, warmth and redness or darkening of one calf.
- Calf pain with chest pain or breathlessness: call emergency services.
- A snap in the back of the leg with inability to push off.
- Calf pain when walking that limits distance, especially in smokers or people with diabetes.
- Fever with spreading redness.
Key points to remember
- Most calf pain comes from muscle strains, cramps or overuse.
- Achilles and nerve problems can also cause calf pain.
- Swelling, warmth and redness of one calf can be a clot.
- Muscular pain improves with relative rest and progressive strengthening.
Questions about calf pain
These answers are general information and do not replace an examination or individual medical advice.
How do I know if calf pain is a blood clot?
Clots usually cause swelling, warmth and redness or darkening in one leg, often with risk factors. Get checked the same day.
Why does my calf hurt when I walk?
Muscle strain, Achilles problems or, in some people, poor circulation can cause pain when walking.
Should I massage a painful calf?
Gentle massage can help muscle soreness, but avoid it if a clot is possible.
How long does a calf strain take to heal?
Usually 2 to 6 weeks, depending on severity.
Why do my calves hurt at night?
Cramps are a common cause, especially with age, pregnancy or after exercise.
Is walking good for calf pain?
For muscle strains, gentle walking within comfort helps. For suspected clots, get checked first.
Can dehydration cause calf pain?
Dehydration can contribute to cramps.
Sources
This guide is for general information and does not replace medical advice. How a problem is diagnosed and treated depends on your examination and medical history. If you think you have an emergency, contact your local emergency services.