A muscle pull can cause mild discomfort or can disable a person from performing his daily activities. One can recognize a pulled muscle due to stiffness and pain in it, that intensifies within the next 24 hours and restricts movement. If the fibers of a muscle tear as a result of overstretching or due to an injury to the muscle or tendon, the condition is known as 'strain'. In layman's language, it is known as a 'pulled muscle'. When a ligament is injured, it is called a 'sprain'.