Overview
A hamstring strain is a sudden injury to one of the muscles at the back of the thigh. It often happens during sprinting, a long stride, kicking or a forceful hinge, and is usually felt as a sharp local pull rather than gradual stiffness.
Typical Pattern
- Sudden sharp pain or pulling at the back of the thigh
- Pain with sprinting, a longer stride, bending forward or contracting the hamstrings
- Local tenderness, and sometimes bruising or swelling
- Reduced confidence or power when pushing off
What Usually Helps
Protect a clearly acute injury from repeated sprint tests and aggressive stretching at first. As walking becomes comfortable, rebuild controlled hamstring strength, then longer-range strength and running exposure. Progress speed last: being able to jog is not the same as being ready to sprint.
When to Get Assessed
Seek timely assessment for a pop, extensive bruising, a visible dent, severe weakness, inability to walk normally, or pain high under the buttock. Those patterns can indicate a more significant muscle or tendon injury.
Related Guidance
References
- Mueller-Wohlfahrt HW, et al. Terminology and classification of muscle injuries in sport. British Journal of Sports Medicine. 2013. https://bjsm.bmj.com/content/47/6/342
This information is for education only and is not a medical diagnosis.