Athletes and others who frequently sprint, climb, jump or lunge are at a higher risk of a painful hamstring injury. Treatment includes rest, ice, compression, elevation and gentle stretching that leads to easy exercises. Most treatments can be done at home.

A hamstring injury typically causes a sudden, sharp pain in the back of the thigh. There might also be a "popping" or tearing sensation. Swelling and tenderness usually develop within a few hours. There might be bruising or a change in skin color along the back of the leg.

Hamstring tendonitis occurs when the soft tissues that connect the muscles of the back thigh to the pelvis, knee, and lower legs become inflamed. Hamstring tendonitis is often brought on by overuse and causes acute, or immediate, pain that decreases with rest and minor first aid. Most people can return to regular activity after a week or so.