For a few months I had been getting strange white goop in my mouth seemingly at random, but it has stopped as far as I know. When I searched about it online, I came to a question here on Yahoo answers about it and people had replied to it saying that it could either be tissues coming out of places inside your mouth that you have chewed (I chew the inside of my mouth), or a sign of cancer. Also, whenever I lie down in a certain position, my bones tremble violently and the only way I can make it stop is if I change positions. this has been happening to me for quite a while now, if I remember correctly. my bones have also been cracking a lot lately. I usually don't feel any pain when they do, however. It's usually just a snapping noise, but it is occasionally accompanied by very slight pain. my wrists and elbows have also been stiff for a while now, though this might be because I constantly do something that involves moving my arms (wrists especially) a lot (and I mean a LOT) every day. I've been wondering if these could be symptoms of bone cancer, or perhaps some other form of cancer or a completely different disease altogether. If you have knowledge in this topic, would you please be so kind as to tell me if I have a disease, which disease it is and what I should do about it? I am very, very frightened about this. thank you.