Depends on the cause
can develop from a partial tear of the calf muscle, a blood clot
, a ruptured baker's cyst
from behind the knee, contusion/hematoma, strain due to altered gait
/limping or it can be referred pain, often from nerve
irritation from the lumbar spine.
How you treat calf pain differs depending on the diagnosis. Until you see a physician, pain meds, limiting your weight-bearing & icing can help.