I agree with the other post that it is caused by bacteria.I had terrible acid relux,gerd and irratible bowel syndrome, I had it all! I came across a website and found a home remedy that helps me. I did this for about a week and man did I feel better. This in my opionion is for adults only and I feel should not be used on children. I just really want to give others the same chance at feeling better. The ingrediants are stuff you probably have at home or you can easily buy at a local store. If you would like to try this you can go to www.gastricure.comIt really has helped me and I hope this will give you all some relief. I am sorry if I sound like an advertisement, but I just want people to know there is some relief if not a cure. This really has helped me!