Lumpy or Hard Stools

Lumpy or hard stools, classified as Types 1 and 2 on the Bristol Stool Form Scale, are the cardinal sign of constipation. This stool consistency is a direct consequence of prolonged colonic transit time, which allows for excessive water absorption from the fecal matter. The result is stool that is dehydrated, fragmented, and difficult to pass. This symptom is central to the diagnosis of functional constipation and is caused by a variety of factors, including low dietary fiber, inadequate fluid intake, certain medications, and primary motility disorders of the colon. The difficulty in passing such stools often leads to secondary symptoms like straining and incomplete evacuation.