Final answer:
A grade 3 strain is a serious injury involving a complete tear of muscle or tendon fibers, leading to severe pain, swelling, and a loss of muscle function. Treatment often involves immobilization, physical therapy, and possibly surgery.
Step-by-step explanation:
A grade 3 strain refers to a severe muscle or tendon injury characterized by a complete tear of the fibers. This leads to significant pain, swelling, and a loss of muscle function. Individuals experiencing a grade 3 strain often lose the ability to use the affected muscle entirely. Treatment for such an injury may require immobilization, physical therapy, and in some cases, surgery to repair the torn tissues.
Grade 3 strains should be treated promptly by a healthcare professional to ensure proper healing and to minimize long-term effects of the injury. It's important to rest the injured area, apply ice to reduce swelling, compress the area if possible, and elevate it above the heart level to manage symptoms before getting professional help.