I have read alot of stories about hearing knee crackling, is it the same I don't think I can hear my knee crackling when I do flextion and extenstion but if I put my hand on my knee then flex or extend I can feel inside my knee is crackling. Is the normal ?
It could be buristis or arthritis, some Dr.'s can do cortisone injections, you should talk to a Dr. And get some x-rays done. I have the poping in my shoulder but I think I am older than you but I do know that it does get irritating.
Both my knees crackle especially when im walking up stairs or doing excercises that consist of bending my legs. I went to a specialist and he told me that the cartilege behind my knee cap has been worn down grinding it out from all the years of hard playing as a child and the activities that I pursued as a grown-up.(i never told him that I was grown up!) but, he said to swim for a less "impact excercise".
My knees crackle when I bend them or do a squate and I asked my physical therapist if that was something to be worried about and she told me that most people's knees crackle, but if they hurt when they do that then that is womething that I should get checked out. So, I am guessing that as long as they don't hurt when they crackle then it's ok.
The crackling (or "cellophane feeling") is called benign crepitus. And as your PT stated, almost everyone has some. The exact cause is still unknown, just as we still do not know what causes the sound when we crack our knuckles.
And, as long as you do not have significant discomfort in the knees, you do not need to have them checked. There actually is no correlation between the crepitus and internal knee problems. Some patients have audibly loud crepitus and have no problems at all. While other, have very minimal crepitus, but have significant knee pain. Again, we do not know the exact etiology of the crepitus.