Irritable bowel syndrome or IBS, also known as spastic colon, causes constipation, diarrhea or alternating bouts of constipation and diarrhea, in association with abdominal pain. This is a very common disorder that affects millions of people. While it more commonly occurs in adults, it can also affect children.
IBS is not a dangerous condition and does not make you more likely to develop cancer. It can often be treated by simply adding more fiber and water to your diet, although medications are sometimes prescribed to decrease the spasm in the bowel.