Slight, temporary digestive disorder, usually caused by mild infection in the alimentary canal, by overeating or hurried meals, or by eating combinations of food that the intestine cannot process. Characteristics are that the intestine shows no or only mild abnormalities, and that the symptoms are slight. The condition can cause abdominal pain, a build-up of wind, thin faeces and possibly diarrhoea. Sometimes there is heartburn. Extensive examination is not necessary, and a doctor need not be consulted.