Digestive Health Irritable Bowel Syndrome Should You Worry About Changes in Your Stool's Appearance? By Barbara Bolen, PhD Barbara Bolen, PhD Twitter Barbara Bolen, PhD, is a licensed clinical psychologist and health coach. She has written multiple books focused on living with irritable bowel syndrome. Learn about our editorial process Updated on November 16, 2020 Medically reviewed by Robert Burakoff, MD, MPH Medically reviewed by Robert Burakoff, MD, MPH LinkedIn Robert Burakoff, MD, MPH, is board-certified in gastroentrology. He is the vice chair for ambulatory services for the department of medicine at Weill Cornell Medical College in New York. Learn about our Medical Expert Board Print Our bodies often give us clues that something is wrong. A change in the appearance of your stool can be an indication that there is something not quite right with your body. Caiaimage / Chris Ryan Getty Images Although there is wide variability as to what a normal stool can look like, there are also some significant changes to stool appearance that may warrant follow-up. Take a look at stool changes that are not considered normal or typical. Such symptoms prompt us to investigate further, typically by seeing a health professional, to pinpoint the underlying cause. If the appearance of your stool has changed, it is essential that you bring it to the attention of your healthcare provider. 1 Hard Stools Alan Grinberg/Moment/Getty Images Hard stools are those pebbly nuggets that are hard to pass. Sometimes the pebbles lump together into one larger mass that passes through in a single bowel movement. In such cases, there may be a sharp edge to the front of this lump. At other times, only a single pebble or a few little nuggets make their way out during a bowel movement. Hard stools indicate that the fecal matter lacks sufficient moisture, typically because it has been in the large intestine for too long awaiting evacuation. Some of the more common causes of hard stool include: Constipation Lack of adequate water intake Lack of dietary fiber Waiting too long to have a bowel movement Health problems with constipation as a symptom Medications with constipation as a side effect What to Do When You Have Hard Stools 2 Loose Stools Yuji Kotani/Digital Vision/Getty Images Loose stools are those that pass through the rectum with a loose, watery appearance. Most often loose stools are associated with the frequent bowel movements of diarrhea. At times, loose stool may be accompanied by strong urges for passage or a sense of urgency to get to a bathroom quickly. Typically, stools become looser and more watery with repeated trips to the bathroom. Loose stools can be caused by: DietStressIntestinal infectionHealth problems with diarrhea as a symptomMedications with diarrhea as a side effect What Are the Causes and Fixes of Loose Stool? 3 Floating Stools Karsten Bidstrup/Lonely Planet Images Floating stools can be caused by something relatively harmless or be an indicator of a more serious health problem. Your floating stools are not something to be too concerned about if they are: InfrequentAccompanied by intestinal gasAssociated with a recent diet change If you start to experience floating stools on a regular basis, it is essential to tell your healthcare provider. Floating stools may be the result of too much fat in your stool, a condition known as steatorrhea. Other symptoms of steatorrhea include: Foul smellOily appearanceSoiling episodes Steatorrhea may indicate a problem with fat malabsorption. This means that fats are not being broken down and digested completely at the level of the small intestine. This may be the result of a lack of adequate amounts of pancreatic enzymes and/or bile acids. The cause of these insufficiencies include: Certain diseases such as pancreatitis and cystic fibrosis Gallbladder removal Gallstones Medication side effects Causes of Floating Stool 4 Strangely Colored Stools Ganymede Photography/Moment Open/Getty Images Normal stools can come in a range of colors, including: Different hues of brown Orange Tan Yellow The following stool color changes should be brought to the attention of your healthcare provider: Black or tar-colored Green Pale, clay-colored Red (bright or dark) 5 Mucus Covered Stools John Lawson, Belhaven/Moment Open/Getty Images Mucus is that clear or slightly yellow gunky substance that sometimes is eliminated alongside the fecal matter of a bowel movement. Small amounts of mucus on the stool is considered to be normal. Larger amounts indicate the presence of an infection or a more chronic health problem. Mucus in Your Stool 6 Bloody Stools Talaj/E+/Getty Images If you see any sign of blood in your stool, you must bring it immediately to the attention of your healthcare provider. The blood may appear bright or dark red and may or may not include clots. Black or tar-colored stools can also be a sign of the presence of blood, but not always. Blood in stools does not always mean that there is something dangerously wrong with you. It could just be the result of a bleeding hemorrhoid or anal fissure. However, some serious health conditions, such as cancer, can cause blood in the stools. See your healthcare provider for immediate medical investigation of any sign that blood is present in the stool. 7 Pencil Thin Stools kemalbas/E+/Getty Images If you only experience thin stool every now and then, it is probably not cause for significant concern as this is not necessarily a sign of a serious health problem. However, you should still bring the symptom to your healthcare provider's attention. If you are experiencing persistent pencil-thin stools you need to tell your healthcare provider immediately. The causes of pencil-thin stools include: Colon cancer Diarrhea associated with irritable bowel syndrome or inflammatory bowel disease Enlarged prostate Polyps in the colon Scar tissue in the colon 4 Sources Verywell Health uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read our editorial process to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy. NIH National Institute of Diabetes and Digestive and Kidney Diseases. Constipation. NIH National Institute of Diabetes and Digestive and Kidney Diseases. Diarrhea. NIH MedlinePlus. Stools - floating. Stanford Health Care. Symptoms of short bowel syndrome. Additional Reading National Cancer Institute. Gastrointestinal complications: Bowel obstruction. By Barbara Bolen, PhD Barbara Bolen, PhD, is a licensed clinical psychologist and health coach. She has written multiple books focused on living with irritable bowel syndrome. See Our Editorial Process Meet Our Medical Expert Board Share Feedback Was this page helpful? Thanks for your feedback! What is your feedback? Other Helpful Report an Error Submit