A muscle tear, also known as a muscle strain, is an injury to a muscle or a tendon, which is the fibrous tissue that connects muscles to bones. It can occur when a muscle is stretched beyond its limits or forced to contract too strongly, resulting in the stretching or tearing of muscle fibers. Muscle strains are classified into three grades to indicate their severity. Minor injuries may only overstretch a muscle or tendon, while more severe injuries may involve partial or complete tears in these tissues. Symptoms of a muscle tear may include sudden pain, muscle spasm, soreness, swelling, bruising, limited motion, and muscle weakness. In severe cases, there may be a "pop" sensation as the muscle rips into two separate pieces or shears away from its tendon, causing considerable pain, swelling, tenderness, and discoloration. Initial treatment for muscle strains includes rest, ice, compression, and elevation. Mild strains can be successfully treated at home, while severe strains may require surgical repair. It is important to see a doctor if symptoms worsen despite treatment, especially if the pain becomes intolerable or if numbness or tingling is experienced.