Irritable bowel syndrome (IBS)
Irritable bowel syndrome (IBS) is one of the common disorders of the large intestine. IBS symptoms can include stomach pain, diarrhea, stomach bloating, constipation and cramping.
Diarrhea

Diarrhea happens when you have watery, loose stools three or more times a day.
Constipation
Constipation is when you have infrequent or hard-to-pass bowel movements, have hard stools, or feel like your bowel movements are incomplete.