Calf pain is a symptom that manifests as discomfort or soreness in the calf muscle. It can range from a dull ache to a sharp, stabbing sensation and can be caused by a variety of conditions. It can develop gradually over time due to overuse of the muscle, or can come on suddenly due to a traumatic injury. It can also be caused by medical conditions such as deep vein thrombosis, compartment syndrome, or muscle strain. Treatment depends on the underlying cause and can range from rest and physical therapy to medications or surgery.