What Causes Frequent Bowel Movements?
May 09, 2022
Source: Cainiu Health
Dr. Liu Zhengxin
Introduction
In general, an increase in bowel movement frequency is referred to as diarrhea, which can be classified into three major categories:
1. Infectious diarrhea—caused by intestinal infections;
2. Functional diarrhea—resulting from functional gastrointestinal disorders that lead to accelerated intestinal motility, excessive water content, and increased secretion;
3. Non-infectious, non-functional diarrhea—such as inflammatory bowel disease (IBD), a relatively common example.
Generally speaking, an increase in bowel movement frequency is clinically referred to as diarrhea—specifically, when a person has more than three bowel movements per day. Based on etiology, diarrhea can be categorized into three major types. The first type is infectious diarrhea, caused by intestinal infections—for example, viral, bacterial, or parasitic infections. Stool tests or stool cultures can identify the specific pathogen involved, enabling targeted treatment—such as antiviral, antibacterial, or antiparasitic therapy—to achieve clinical efficacy and restore normal bowel function.
The second type is non-infectious, functional diarrhea, resulting from disorders affecting intestinal motility, excessive water content in the stool, or increased intestinal secretion. Examples include functional gastrointestinal disorders such as the diarrhea-predominant subtype of irritable bowel syndrome (IBS-D), functional diarrhea, hyperthyroidism-induced diarrhea, and diabetic diarrhea.
The third type comprises non-infectious, organic diarrheas—i.e., those caused by structural or inflammatory diseases of the gastrointestinal tract. A common example is inflammatory bowel disease (IBD), an autoimmune-mediated disorder requiring long-term management. Therefore, patients experiencing diarrhea who are unable to determine its cause should seek timely medical evaluation at a hospital, where physicians can assist with accurate diagnosis and appropriate treatment.
