Pencil-thin stools
Overview
Pencil-thin stools are abnormally narrow bowel movements that appear significantly thinner than normal stool diameter. This change in stool caliber may indicate a blockage or narrowing in the colon or rectum.
Common Causes
Pencil-thin stools can occur when there's narrowing or obstruction somewhere in the colon or rectum that compresses the stool as it passes through. This narrowing might be caused by inflammation from conditions like inflammatory bowel disease, muscle spasms in the intestinal wall, or growths such as polyps or tumors. Chronic constipation can also lead to changes in stool shape as hardened waste material creates blockages. Additionally, certain medications, dietary changes, or stress can affect bowel muscle function and alter stool formation.
Severity Levels
Mild: Occasional pencil-thin stools mixed with normal-sized bowel movements, lasting only a few days with no other symptoms.
Moderate: Consistently narrow stools for more than a week, accompanied by mild abdominal discomfort or changes in bowel habits.
Severe: Persistent pencil-thin stools for several weeks, especially when combined with blood in stool, significant abdominal pain, unexplained weight loss, or complete inability to pass normal-sized stools.
Medical Attention
You should contact your doctor if this change persists for more than a few days or occurs frequently. Seek immediate medical attention if you experience additional symptoms like severe abdominal pain, blood in stool, significant weight loss, or inability to pass gas. It's especially important to get evaluated promptly if you're over 50 or have a family history of colorectal conditions.
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