Your calf muscle sits in the back of your lower leg. It starts below your knee and extends to your ankle.

Where is the calf of your leg located?

Your calf—located in the back of your leg just below the knee—is made up of three muscles: the gastrocnemius, soleus, and plantaris muscles.

When should I be concerned about calf pain?

See your doctor as soon as possible if you have:

Signs of infection, such as redness, warmth or tenderness, or you have a fever greater than100 F (37.8 C) A leg that is swollen, pale or unusually cool. Calf pain, particularly after prolonged sitting, such as on a long car trip or plane ride.