Motility disorders occur in the upper and lower sections of the digestive tract.Pseudo-Obstruction:
 Can be caused by slow movement of the small intestines, leading to abdominal distention and difficulties with eating.Chronic Constipation: 
When a child's inability to have regular bowel movements is severe, blocks can form and can cause them to leak stool.They include:
Achalasia:
 Occurs when the esophagus cannot move correctly, leading to food backing up into the esophagus.This can cause severe nausea, vomiting, abdominal pain, and weight loss.This causes swallowing difficulties and vomiting.Gastroparesis:
 A delay of food moving from the stomach into the intestines.