Stool Color-Causes-Disease-Dr Qaisar Ahmed-Al Haytham clinic-Risalpur-KPKDr Qaisar Ahmed MD, DHMS.
Stool color changes can be caused by a number of underlying conditions. The normal stool (poop, feces) usually is light to dark brown. Although changes in stool color or texture may be normal, most changes should be evaluated.

The symptoms associated with stool color changes, if any, are the symptoms of the underlying cause of the change, for example, foods, drinks, or illnesses such as:

Stool that is an unusual color may be due to diarrhea; bleeding in the intestine; intestine, pancreas, or liver diseases; and medications.

Green stool or poop is a common stool color change. It may be due to bile pigment in the stool because diarrhea moves food too quickly through the intestine so the intestinal chemicals and bacteria can’t break down the bile pigment to its normal brown color, or the green color may be due to certain foods like green, leafy vegetables or green food coloring.

Red or black poop may be a sign of bleeding in the digestive tract (from the esophagus, stomach, small intestine, or colon) and should not be ignored.

When stool color changes, what tests need to be done depends upon what cause is suspected of the stool color change. For example, gastrointestinal tract endoscopy (may be required to evaluate red or black stools if bleeding is suspected.

See the treatment for stool color changes in the treatment of the underlying cause.

Rectal Bleeding (Blood in Stool, Hematochezia)

Causes of Blood in Stool

Blood in the stool can be bright red, maroon in color, black and tarry, or occult (not visible to the naked eye). Causes of blood in stool range from harmless, annoying conditions of the gastrointestinal tract such as hemorrhoids to serious conditions such as cancer.

Stool Color-Causes-Disease-Dr Qaisar Ahmed-Al Haytham clinic-Risalpur-KPK

What are symptoms of stool color changes?

Changes in stool color alone do not cause symptoms. The underlying cause of the change in stool color, texture, or form is responsible for any symptoms.

What does it mean when your stool color changes in color, texture, or form?

The stool (feces, poop) color is most commonly brown. When stool color changes, a person, parent, or caregiver often becomes concerned.

  • The presence of the bilirubin in the bile (a breakdown product of the hemoglobin in red blood cells that are normally destroyed after a useful life of several weeks) is generally responsible for stool color.
  • Bilirubin concentration can vary the color of the stool from light yellow to almost black.
  • Changes in the chemical structure of the bilirubin can cause stool to turn green or yellow.
  • Yellow stool also may occur if the stool is dilute or a reduction in the amount of bilirubin produced by the liver.
  • Bacteria and digestive enzymes in the intestine can act on the bilirubin and change its color (diarrhea that may cause yellow-green stools).
  • Diseases affecting the liver, pancreas, and intestines
  • Bleeding from the intestinal tract

Most stool-to-stool changes in color have little meaning. However, some changes, particularly if the changes are consistent over time and not present in only one stool may mean something needs to be investigated.

Stool color chart

Stool Color Changes Chart
Color Potential Cause Comment
Black GI bleeding This is an emergency
Black Iron, bismuth Cannot presume this to be the reason for the stool color
Maroon Gastrointestinal bleeding This is an emergency
Red Hemorrhoids Only one of the potential causes. Do not ignore
Red Inflammatory bowel disease Consult a health care professional
Red Infection, diverticular bleed Consult a health care professional
Red Tumor, rapid upper GI bleed Consult a health care professional
Green May be normal Consult a health care professional
Green Diet high in green vegetables
Green Associated with diarrhea Consult a health care professional
Brown Normal color
Yellow Diseases of the pancreas Malabsorption
Yellow Celiac disease, cystic fibrosis Consult a health care professional
Yellow Giardia infection Consult a health care professional
Clay, pale yellow or white Liver or biliary disease Lack of bile in the stool

beets-Stool Color-Causes-Disease-Dr Qaisar Ahmed-Al Haytham clinic-Risalpur-KPKGreen stools

If stool passes through the intestine too quickly, there might not be enough time for bile to be digested and broken down to provide the normal brownish stool color. Normally, bacteria in the intestine chemically change bile to a greenish-brown color. It takes time for the bile to be fully changed in the intestine and become brown again, and if the transit time is short, for example, when a person has diarrhea, the stool remains green-colored.

Green stools may be a normal variant. A diet rich in green vegetables, especially spinach, or Iron supplements also may cause green poop, though iron often turns stool black.

It can be due to the intestine’s inability to digest and absorb fat because of diseases of the intestinal lining (such as celiac disease and cystic fibrosis).

Yellow, greasy, and foul-smelling stool

There are a variety of reasons why stool will be yellow, greasy, and foul-smelling. It can be due to the intestine’s inability to digest and absorb fat because of diseases of the intestinal lining (such as in celiac disease and cystic fibrosis) because the pancreas is unable to manufacture adequate digestive enzymes (such as with chronic pancreatitis or pancreatic cancer that blocks the pancreatic duct), or there is not enough bile being delivered to the intestine (such as in cancer of the liver or bile ducts that are blocked). The yellowness, greasiness, and foul smell are due to the undigested fat.

The most common cause of bright red-colored stool in adults is bleeding from hemorrhoids.

Bright red stools

The most common cause of bright red-colored stool in adults is bleeding from hemorrhoids. In infants, the most common cause is an anal fissure or tear in the tissue surrounding the anus.

Other causes for bright red blood in the stool may be more serious such as:

  • Infections of the intestines,
  • Inflammatory bowel disease (Crohn’s diseaseulcerative colitis),
  • Diverticular bleeding,
  • Tumors,
  • Arteriovenous malformations (abnormal communications between arteries and veins in the wall of the intestine that rupture),
  • Brisk bleeding from the ulcer in the esophagus, stomach, or duodenum also may cause stools to be red instead of black if there has not been enough time for the red blood cells to be digested,
  • Red food coloring and beets can also give a reddish hue to the stool.

Black stools are a worrisome symptom because it may be due to a large amount of bleeding into the digestive system, most often from the upper GI tract including the esophagus, stomach, and duodenum. Light-colored or clay-colored stools are often seen with diseases of the liver or bile ducts.

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Clay-colored or white stools (pale stools)

Light-colored or clay-colored stools are often seen with diseases of the liver or bile ducts. The pale stool may be caused by pancreatic cancer that blocks the bile ducts. Lack of bile causes stool to lose its brown color and leaves it appearing pale.

Maroon stools Bowel cancer symptoms-Stool Color-Causes-Disease-Dr Qaisar Ahmed-Al Haytham clinic-Risalpur-KPK

Maroon colored stools are often due to bleeding in the GI tract. The source of bleeding for red stools is the upper GI tract (esophagus, stomach, duodenum), while the colon is the source for bright red blood. Maroon stools, which is caused by partial digestion of the blood in the intestine often arises from the small intestine (jejunum, ileum) and proximal colon, but the color also depends in part on how rapidly the blood travels through the intestines. The faster the stool moves through the GI tract, the brighter red the color. This can be an emergency.

In children with intussusception, where one portion or the intestine telescopes into another part, causing a temporary obstruction, stools may be described as currant jelly in color and consistency.

Mucus in the stool

Mucus in the stool may be normal, and it may cover segments of formed feces. However, it also can occur in people with inflammatory bowel disease or cancer. Mucus associated with blood and/or abdominal pain should not be ignored and requires medical attention. People with irritable bowel syndrome (IBS) also can have mucus in the stool.

Drugs that change stool color

The most common medications that change the color of stool are the drugs that turn the stool black and include iron and bismuth (contained in Pepto-Bismol and Kaopectate). Nevertheless, a large number of other drugs have been associated with changes in the color of stool to black or other colors. Practically, the importance of this fact is that the any new drugs or dietary supplements need to be considered as the cause of any change in stool color.

Stool that float

Sometimes stool floats because it contains an excessive amount of gas. By itself, it is normal and has little meaning. Changes in diet can lead to the stool that floats, but as an isolated symptom, no action needs to be taken, and often it resolves spontaneously. The stool does not float because of an increased amount of fat. (Fat in stool causes oil droplets in the toilet bowl).

Any condition that causes increased amounts of gas to form in the intestines theoretically may lead to floating stool, especially in conditions where there is malabsorption of nutrients such as lactose intolerance, celiac disease, cystic fibrosis, and short bowel syndrome.

Changes in the size and shape of stool

People have their own size, shape, and stool consistency. It is the change in stool pattern that matters more than the absolute size and shape of the stool. Narrow stool, sometimes called pencil-thin, may occur occasionally and is of no concern. People with irritable bowel syndrome (IBS) may develop thinner stools.

Nevertheless, a person with “normal” stools that has a new change in the diameter, length, width (caliber) of the bowel movement should consult his/her health care professional. This may be a sign of a narrowed or scarred colon, perhaps due to a tumor, but the health care professional may want further information about accompanying symptoms or tests.

It is not unusual to have two or even three stools in the morning. The first stool will usually have a more solid form because it has been in the colon (where water is absorbed) the longest. The second stool will be looser, and if there is the third stool, it will the loosest. Another change in stool form that often requires evaluation is the development of looser or firmer than normal stools. At one end of the spectrum is constipation and at the other end is diarrhea, but even if the change does not reach these levels, consistent, milder changes in either direction need to be evaluated.

Diagnosed of the cause of stool color change

In most cases, a diagnosis, if any, cannot be made by stool color alone.

The patient and the doctor need to consider other symptoms, past medical history, dietary changes, and medications to help decide what has caused the stool to change color. Physical examination will be important to help decide the significance of the stool color.

Stool may be tested to look for blood, fat, or infection. Blood tests may be necessary depending upon the clinical situation. Depending on the change in color, it may be necessary to evaluate the pancreas, liver or GI tract.

P. SThis article is only for doctors having good knowledge about Homeopathy and allopathy, for learning purpose(s).

For proper consultation and treatment, please visit our clinic.

Location, address and contact numbers are given below.

None of above-mentioned medicine(s) is/are the full/complete treatment, but just hints for treatment; every patient has his/her own constitutional medicine.

Dr Qaisar Ahmed MD, DHMS.Dr. Sayyad Qaisar Ahmed (MD {Ukraine}, DHMS), Abdominal Surgeries, Oncological surgeries, Gastroenterologist, Specialist Homeopathic Medicines.

  Senior research officer at Dnepropetrovsk state medical academy Ukraine.

Location:  Al-Haytham clinic, Umer Farooq Chowk Risalpur Sadder (0923631023, 03119884588), K.P.K, Pakistan.

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