The cause is calcium built up in your gallbladder, and they turn into stones. they continue coming back, so the gall bladder has to be removed.
The symptoms are stomach pain, back pain, and nausea. Usually upper stomach pain, but can be all over. some times your chest hurts like you feel like your having a heart attack. when you eat spicy, you really hurt, and sometimes throw up. I suffered 4-5 months before I went to ER with severe symptoms. I had my gallbladder removed at age 21. I'm 42.
webmd.com/digestive-disorders…
My mom had them and had to have surgery 
Any who, this site gives you all the information on it as well as symptoms, etc.
This is the very best site that I have found on
Gallstones, the causes…symptoms…
and the operation for removal.
You can click on the link below to take you
there…it is very easy to understand:
markfuscomd.com/gallbladder.h…
Also, on the light blue words on this site…
if you click on them…it will give you even more
information.
Hope this helps you.