Excessive bingeing and purging can cause dehydration, constipation, abdominal cramping, bloating, irregular bowel movements, diarrhea, irregular menstrual periods (or much stopping), and low levels of magnesium, potassium and sodium. Bulimics can also have medical issues such as ulcers and delays of the stomach emptying its contents once the deconstruction from the acids has been completed. More information: click here