An injury or arthritis most likely causes pain outside the knee. A doctor can determine the cause based on your other symptoms and the results of imaging tests.
Long periods of physical work involving positioning the arms over the shoulder and excessive load on the shoulders are common direct causes of shoulder pain.
Ligament injuries in the knee -- such as an anterior cruciate ligament (ACL) -- can put you on the sidelines -- fast. They hurt a lot and may limit what you can do. But more often than not, a comeback may still be possible. Treatment is more successful than it once was.
When something compresses or pinches a nerve in the shoulder, a person may experience pain, numbness, or tingling. Pinched nerves typically heal without treatment.
Knee pain at night is a common discomfort that can be caused by injury, arthritis, bursitis, gout, and more. This pain at bedtime is not only frustrating but also can lead to pain-induced insomnia, which can leave you exhausted during the day.