<unk>  is defined as the passage of unformed or abnormally fluid stools at an increased frequency.<unk><unk>  has a duration of < 4 weeks and may be classified on the basis of etiology and presentation. On the basis of etiology,<unk><unk>  may be classified into infectious and non-infectious sub-types. Based on the type of presentation,<unk><unk>  may be classified into watery and inflammatory types. Watery<unk>  may be further classified into secretory and osmotic types of<unk> .
Acute diarrhea classification
Traveler's diarrhea classification
Constipation classification
Gastritis classification
Peptic ulcer classification
Irritable bowel syndrome classification
Dyspepsia classification
Short bowel syndrome classification