What Are the Main Causes of Frequent Loose or Watery Stools?

Unformed stools and frequent diarrhea may result from intestinal dysfunction. When the autonomic nervous system—which regulates intestinal function—becomes impaired, it can lead to uncoordinated intestinal motility, manifesting as abdominal pain, diarrhea, and unformed stools. Additionally, chronic enteritis may be responsible: viral or bacterial infection of the intestine can cause inflammatory changes in the intestinal mucosa, resulting in unformed stools and, in severe cases, purulent or bloody stools.