In bulimia nervosa, repeated purging can cause dangerous electrolyte disturbances, particularly involving potassium. These imbalances can affect the heart and, in severe cases, become life-threatening. Repeated vomiting can also damage the oesophagus, contribute to dental erosion and cause gastrointestinal problems. Dehydration and nutritional deficiencies can affect the kidneys, muscles, hormones and nervous system as well.
