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.
Sciatica as a cause of knee pain is definitely a possibility due to a number of factors. This link of sciatica as a cause of the knee pain is due to the anatomical makeup of the sciatic nerve. Specifically, the starting point of the sciatic nerve is at the base of the spine.