Pain in your calf (the back part of the lower leg) is usually caused by a cramp or muscle strain. However, sometimes calf pain can be a symptom of something more serious.
What is calf pain?
The calf is made up of 2 muscles called the gastrocnemius and the soleus. They meet at the Achilles tendon which is attached to the heel bone.
Overstretching or tearing either of these 2 calf muscles is known as a calf strain. Normally there is a sudden pain in your calf, and you may feel a pop, snap or tear. A calf strain may also mean you experience the following symptoms:
- You have pain that can range from a dull ache to a sharp, intense pain.
- Your calf is stiff and weak when you walk.
- You find it hard to rise up onto your toes.
- You may have bruising on your calf after 1 or 2 days.
What causes calf pain?
Calf pain is usually caused by cramp, when your muscles suddenly contract. This might happen if you have been doing new exercises, if you are dehydrated, or if you are deficient in some minerals. Cramps normally go away quite quickly by themselves.
If you overuse the calf muscles or don't use them properly, you can develop a calf strain or Achilles tendonitis in which the Achilles tendon becomes inflamed.
Other possible causes of calf pain include:
- sciatica — when you have problems with the sciatic nerve which controls your lower leg
- a bruise due to injury
- diabetic peripheral neuropathy — when you have nerve damage that affects your feet, legs, arms and hand
- deep vein thrombosis (DVT) — when a blood clot forms in the deep veins of your arm or leg. This is a medical emergency. See your doctor immediately if you think you might have DVT (see below).
- compartment syndrome — a serious condition when a lot of pressure builds up inside a muscle, usually after an injury
When to seek help for calf pain
See your doctor if:
- your calf is swollen
- your calf is unusually cool or pale
- your leg is tingly or numb
- your leg is weak
- you have fluid retention
- your calf is red, warm and tender
- both legs are swollen and you have breathing problems
- your calf is painful during or after walking
- the pain gets worse or doesn't improve after a couple of days of being treated at home
- you have painful varicose veins
Seek medical attention straight away if you have the symptoms of DVT and you have recently been sitting for a long time, such as on a flight. These include if:
- you can see veins in the affected area
- your calf is swollen
- your leg is tender
- the skin is discoloured
- your calf feels warm
Calf pain treatment
If you have a muscle cramp, gently stretch or massage the muscle.If you have a calf strain or Achilles tendonitis, you should first of all use the ‘RICE’ method of treatment:
- Rest the area.
- Ice the area for 20 minutes, using a covered icepack or bag of frozen peas.
- Compress the area with a bandage (but if the pain gets worse, loosen the bandage).
- Elevate the lower leg by sitting or lying down (for example with pillows), so it is above the level of the heart.
You can take anti-inflammatory medicines to relieve pain and bring down the swelling. After 48 hours, start stretching and strengthening the muscle, for example by doing heel raises and calf stretches. Don't return to full physical activity until you can move your ankle and knee properly, the pain and tenderness have gone, and the strength has fully returned to your calf.
How to prevent calf pain
Always stretch before and after you exercise to repair and strengthen the calf. Don’t over exercise, and build up gradually if you are starting something new.
Drink plenty of water to avoid cramps. Magnesium supplements have been shown to prevent cramps in some people, especially pregnant women, although the evidence is not conclusive.
Last reviewed: June 2018