Strain (injury)

Strain
Other namesMuscle strain, pulled muscle, torn muscle
Two images of the same strain to the hamstring and associated bruising.
SpecialtyEmergency medicine, sports medicine
SymptomsBruise, swelling, redness and soreness
CausesExcessive stress and/or repeated injury on a muscle

A strain is an acute or chronic soft tissue injury that occurs to a muscle, tendon, or both. The equivalent injury to a ligament is a sprain. Generally, the muscle or tendon overstretches and partially tears, under more physical stress than it can withstand, often from a sudden increase in duration, intensity, or frequency of an activity. Strains most commonly occur in the foot, leg, or back. Initial treatment typically includes rest, ice, compression, and elevation (RICE).