First aid for your joints: when you need to see a doctor. A fall on your knee, shoulder, wrist, hip or head can have dire consequences.
Dr. Manuel Köhne: Snapping and clicking noises in the knee indicate a torn cruciate ligament. If you have very severe thigh pain after a fall, you should have an X-ray taken. An ultrasound examination, which is usually available quickly, can reveal muscle and tendon injuries. If the leg can no longer be stretched or bent, this indicates a pinched meniscus.