Narrowing of Stool
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Reviewed By:
Aiko Yoshioka, MD (Gastroenterology)
Dr. Yoshioka graduated from the Niigata University School of Medicine. He worked as a gastroenterologist at Saiseikai Niigata Hospital and Niigata University Medical & Dental Hospital before serving as the Deputy Chief of Gastroenterology at Tsubame Rosai Hospital and Nagaoka Red Cross Hospital. Dr. Yoshioka joined Saitama Saiseikai Kawaguchi General Hospital as Chief of Gastroenterology in April 2018.
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Smaller caliber stool
Narrow (thin) stools
Long and thin stool
Smaller caliber poo
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Content updated on Jan 4, 2023
About the symptom
Decrease in stool caliber describes a condition with thin narrow stools.
When to see a doctor
Seek professional care if you experience any of the following symptoms
Thin narrow stool
Possible causes
- Colon cancer
Cancer of the large intestines. It can be treated easily in the early stage, hence the general population is encouraged to go for screening with stool blood tests and colonoscopy (camera screening).
- Rectal cancer
Rectal cancer is cancer that begins in the rectum. Malignant, or cancerous cells form in the tissue of the rectum and can spread to other parts of your body.
- Sigmoid colon cancer
The sigmoid colon is the terminal portion of the large intestine/ colon before reaching the rectum. The exact cause of sigmoid colon cancer is unknown but the cancer begins when healthy cells in the colon develop changes (mutations) in their DNA. Risk factors include family history, certain hereditary cancer syndromes, diet, smoking and alcohol use.
- GIST
Questions your doctor may ask about this symptom
Your doctor may ask these questions to check for this symptom
Has your stool become thin and narrow (like a pencil)?
Do you have a fever?
Is there blood in your stool?
Do you have hard stools or constipation recently?
Do you have nausea or vomiting?
Other Related Symptoms
Similar symptoms or complaints
Symptoms from the same body system / part
Symptoms treated by the same specialty
Reviewed By:
Aiko Yoshioka, MD (Gastroenterology)
Dr. Yoshioka graduated from the Niigata University School of Medicine. He worked as a gastroenterologist at Saiseikai Niigata Hospital and Niigata University Medical & Dental Hospital before serving as the Deputy Chief of Gastroenterology at Tsubame Rosai Hospital and Nagaoka Red Cross Hospital. Dr. Yoshioka joined Saitama Saiseikai Kawaguchi General Hospital as Chief of Gastroenterology in April 2018.
Just 3 minutes.
Developed by doctors.
Ubie is supervised by 50+ medical experts worldwide
Seiji Kanazawa, MD, PHD
Obstetrics and gynecology (OBGYN)
National Center for Child Health and Development, Japan