Overexertion or overstretching causing tearing of muscle fibers, with localized pain and little to no swelling, is a

• A. Sprain
• B. Contusion
• C. Avulsion
• D. Strain

Answer: (D)

A strain is a tear or micro-tearing of muscle fibers from overexertion or overstretching. This type of injury typically causes localized, point-specific pain at the muscle, and swelling is usually mild or minimal because the damage is within the muscle tissue rather than at a joint or from direct blunt impact. You’ll often hear about strains in muscles like the hamstrings or back after a sudden sprint or awkward lift.

In contrast, a sprain involves ligaments surrounding a joint and tends to produce more pronounced swelling, bruising, and joint instability. A contusion is a bruise from a direct impact and shows discoloration and swelling from bleeding into soft tissues. An avulsion is more severe, where a tendon or piece of bone is pulled away from its attachment, often with significant dysfunction and sometimes deformity. For a suspected strain, initial care is RICE—rest, ice, compression, and elevation—with gradual return to activity as pain allows, while watching for any worsening signs that would warrant medical evaluation.