Constipation can cause stools that are hard and large, which can hurt when you pass them. Stressing your anal canal from constipation can also cause anal fissures, which are small tears. Anal cancer ...

Stool changes with pancreatic cancer can include diarrhea, foul-smelling stool, constipation, and changes in stool color. The pancreas is an organ between the stomach and the spine that helps the body ...

Celiac disease can cause diarrhea or constipation. Stools may be greasy, watery, or foul-smelling. The appearance of poop may depend on how much gluten a person consumes. Celiac disease is an ...