• Anorexia nervosa: It is an eating disorder characterised by immoderate food restrictions, inappropriate eating habits or rituals and obsession with having a fear of weight gain which results in excessive weight loss and is harmful to health. There is no history of eating indigestible foods.
• Bulimia nervosa: It is an illness in which a person has regular episodes of overeating followed by excessive purging with a feeling of loss of control. People with bulimia generally eat large amounts of high calorie foods secretly. The foods eaten may be junk food, but there is no history of eating indigestible foods.
• Worm infestations: Parasitic infestation of intestines is very common throughout the world. Children are particularly susceptible to worms. There are over 100 different types of parasites that can live in human body. These parasites may cause many ill health conditions including diarrhoea and gastrointestinal upset.