Welcome to Healthcare Magic .Thanks for the query .Fall on the knee and its pain can be reduced by resting the knee and keeping it in immovable state for some time and use two crutches, keeping weight off the leg with the sore knee. . cold
compression is yet another means of pain relief before you take advice from a doctor or physiotherapist .Gently rub or massage
the area to increase blood flow.Avoid judo before consulting a doctor.there is no such issue of fracture
so don`t worry .