What Causes Tmj?

I've been trying to find a reason a have it. At first I thought it was bad posture but then I found that my bad posture was due to other things like breathing problems. Open mouth breathing due to nasal congestion. I also sucked on my tongue to the roof of my mouth a lot due to nasal congestion. Now there are many facts to take into consideration when it comes to nasal congestion like a broken nose, obstructions, allergies, colds, bad immune system and sinus infections. I've had sinus infections most of my life and didn't really know it. I had a little trouble breathing through my noise but I didn't think it was that bad and I had pressure around my sinus cavity. It was due to bacteria building up in there. So I went to the store and got some nasal solution for sinusitis(sinus infections) and now my overall heath is improving. No more tongue sucking, headaches, congestion. So now I don't open mouth breath as much anymore. I am trying colloidal silver for my immune system right now, which kills fungus, bateria and other unwanted living creatures in my body and is said to be good for sinusitis. It seems to be helping but it takes a few days to know for shure what's happening.