Call for emergency medical help. If you suspect you're having a heart attack, don't hesitate. Immediately call 911 or your local emergency number. If you don't have access to emergency medical services, have someone drive you to the nearest hospital.
The most common causes of knee weakness are osteoarthritis, sprain or strain, and chronic knee pain. Other possible causes, such as injury to the knee, are more rare. Osteoarthritis 22. Sprain or strain 17. Chronic knee pain 15. Knee ligament or meniscus tear 8. Fracture of the leg 4. Bursitis 2.
Common Knee Problems that May Be Caused by Weak Hips. Common knee injuries and problems that may occur as a result of hip weakness include: If you are experiencing knee pain, you should visit your doctor or physical therapist. He or she can evaluate your condition to determine the cause of your pain.