You have been to the dentist before, complaining about a tooth aching, only to find out that it was another tooth that was infected and the pain was radiating.
So it is with your body. Many times I have gone to Dr. Cherie my chiropractor, and said, "I trashed my knee." And she always replies, "It's not your knee, it's your pelvis," adjust my pelvis and the knee pain disappears.
Lately there have been lots of commercials about fluid injections for bad knees. I have two friends who went through the process, and neither one of them was helped. Why? Because it's not their knees that were the problem - it was a misalignment in their bodies.
Before you use any band-aid therapy, make sure you are treating the right place. Symptoms can be hidden, but until you get to the root cause, the symptoms will keep coming back.
Take care of your whole body. It will thank you for the gift.