Youth baseball leagues often have fairly strict limits on how many innings pitchers can pitch, or how many pitches a player can throw. But for girls playing fast-pitch softball, such guidelines are rare. One reason is that softball pitchers throw underhand, a motion thought to stress the arm less than the overhand throws seen in baseball.
The symptoms of rotator cuff tendinitis tend to get worse over time. Initial symptoms may be relieved with rest, but the symptoms can later become constant. Symptoms that go past the elbow usually indicate another problem.