The real cause of this disturbing increase in ACL injuries in women is probably multifactorial. Whether female or male, ACL knee injuries can leave the athlete with a sense of instability within their knee. Typically, injury occurs when an athlete performs a twisting or cutting movement, or less commonly with direct contact. This injury may be quite painful, but not necessarily so. Swelling follows soon thereafter.
Crutches are beneficial.
Early and full range of knee motion is essential. Returning to sports is not advised. Although there is often some improvement early on, returning to sports brings out the feeling of instability again. Indeed, further injury to the knee may result. Therefore, it is important to contact your knee doctor for a definitive diagnosis.