As mentioned above, gallstones can cause diarrhea which is common when the digestive system doesn’t get adequate amounts of bile. The opposite can also be true. Low levels of bile can also cause constipation which is the complete opposite of diarrhea. Constipation can be defined as slow muscle contractions along the digestive tract. These contractions are essential for moving food throughout the body.
Constipation is a common symptom when there are complications like gallstone ileus which is rare and characterized by large gallstones passing from the gallbladder. The stones block movement of food in the intestines making it impossible for food to reach the large intestine (colon).