Digestive system complications

Nutritional deficiencies. Thick mucus blocks the tubes that carry digestive enzymes from your pancreas to your intestines. Without these enzymes, your body can't absorb protein, fats or the fat-soluble vitamins — A, D, E and K.
Diabetes. The pancreas also produces insulin, which your body needs to use sugar. Cystic fibrosis increases your risk of developing diabetes.
Blocked bile duct. The tube that carries bile from your liver and gallbladder to your small intestine may become blocked and inflamed, leading to liver problems, such as cirrhosis, and sometimes gallstones.
Rectal prolapse. Frequent coughing or straining during constipation can cause internal rectal tissue to protrude outside the anus, particularly in infants.
Intussusception. Children with cystic fibrosis are at higher risk of intussusception, a condition in which a section of the intestines folds in on itself like an accordion. This results in bowel obstruction, an emergency condition.