Symptoms A-Z

Anal Mucous Discharge Symptoms, Causes & Statistics

Are you experiencing visible rectal discharge? While mucus in the digestive system helps move along feces to its final destination, visible anal mucus discharge is abnormal. This could be due to an infection caused by undercooked meat, inflammation condition that affects the bowels, or dietary changes. Read below for more information on causes and treatment options.

An image depicting a person suffering from anal mucous discharge symptoms

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  1. Symptoms
  2. Causes
  3. 7 Possible Anal Mucous Discharge Conditions
  4. Treatments and Relief
  5. FAQs
  6. Statistics
  7. References

Anal Mucous Discharge by Itself or in Stools Explained

Mucus is a slippery or slimy substance that is naturally produced by your bowels. It helps lubricate stool or feces as it moves through the bowels and can protect the walls of the bowels from more abrasive foods that you might eat (e.g. small seeds and nuts). It also helps prevent fluid loss from the walls of the colon and keeps the walls of the colon moist and functioning well. It is secreted by cells called goblet cells. There are many reasons that one can have an increase in mucus either by itself, accompanied by stool, or accompanied by blood and stool that will be reviewed below.

Common accompanying symptoms of anal mucous discharge are

Other associated symptoms of mucous discharge may include the following:

You should seek care promptly if you experience persistent or worsening diarrhea or abdominal pain or if your symptoms of discharge continue. A medical provider can determine the cause and the best course of treatment.

What Causes Anal Mucous Discharge?

The causes of increased mucous discharge can be effectively separated into four categories: infections, inflammatory conditions, diet, and malignancy.


Many types of infection can cause inflammation of the walls of the large intestines and activate “goblet cells” which produce mucus. The different types of infections will be discussed below.

  • E. Coli: There are many types of E. Coli and some can cause watery diarrhea while others cause bloody diarrhea or diarrhea coated in blood and mucus. Two of the most common strands that cause diarrhea with mucus are EHEC (Enterogenic Hemorrhagic E. Coli) and EIEC (Enterogenic Inflammatory E. Coli). EIEC is usually “self-limited” meaning it resolves on its own, while EHEC can sometimes cause transient kidney failure in children and may require dialysis as the body recovers.
  • Campylobacter: Campylobacter is a corkscrew-shaped bacterium that is often caught after consuming undercooked poultry or food that has fecal matter on it (often from the unwashed hands of the person who prepared it). It can cause frequent (10 or more) loose stools per day with both blood and pus as well as severe abdominal pain. In most people with normal immune systems (e.g. no HIV, chemotherapy, or bone marrow transplants), Campylobacter usually causes up to two weeks of symptoms. It is also resistant to multiple types of antibiotics and therefore is treated through lots of fluids with electrolytes and bedrest.
  • Entamoeba: Entamoeba is a parasite commonly associated with accidental ingestion of feces (e.g. a food preparer’s unwashed hands). These organisms can cause a condition called amebiasis in which large amounts of diarrhea are produced that are full of the “cysts” or eggs of the causal organism. It is easily treated with antibiotics.

Inflammatory conditions

There are many diseases which cause inflammation of the bowels and can cause mucus in stool. We will discuss some of the most common in detail below

  • Crohn Disease: This is a disease involving inflammation of the small intestine. It almost always involves the small intestine, and occasionally, it involves both the small intestine and the colon. For a small minority, only the colon is involved. Among those with colonic involvement, it is possible to have blood, pus, or mucous discharge from the anus, especially during Crohn Disease flares. The primary treatment of these symptoms and to control Crohn Disease is with strong anti-inflammatory medications. With proper control, it is still common to have frequent bowel movements, but symptoms of infection and anal discharge may decrease.
  • Ulcerative Colitis: This is a separate inflammatory condition that affects the bowels. It commonly involves the lower intestines and the rectum, whereas Crohn “spares” the rectum. The colitis in Ulcerative Colitis refers to inflammation which may cause abdominal pain, incontinence, and discharge of blood and mucus from the anus.
  • Celiac Disease: This may present early or later in life and classically presents with foul-smelling, floating stools, as well as diarrhea and flatulence. Because hypersensitivity to gluten can damage the absorptive surfaces of the colon, celiac disease can lead to severe nutrient deficiency as it damages the portion of the colon that is necessary to absorb essential nutrients and fats. In extreme cases, celiac disease can cause high-volume stools with scant mucus [1].
  • Irritable Bowel Syndrome (IBS): This is characterized by a cramping sensation though its symptoms can be much more variable. Nearly half of all people with irritable bowel symptoms complain of anal mucous discharge [2]. Notably, irritable bowel syndrome is not associated with other symptoms of bowel inflammation. Bloody stools are considered uncommon for IBS [3].


Cancerous causes of mucous discharge may include the following.

  • Anal Cancer: This form of cancer is uncommon. It primarily affects the anus but can spread to tissue in other areas of the body. It can go unnoticed as the symptoms of anal cancer are common to many other types of benign (non-cancerous) disorders including hemorrhoids and anal fissures. The common symptoms include itching or pain around the anus, rectal bleeding, and mucous discharge from the anus [4].
  • Colon Cancer: This a common type of cancer that often has no symptoms until late in its progress. Symptoms are most commonly caused by the impact of the mass of cancer on the passage of stool. Blood in the stool, constipation, or anemia from the loss of blood are common symptoms. One type of colon cancer, called mucinous adenocarcinoma, makes up about one in five colon cancers and is made primarily of mucus with cancer cells mixed in. This type of cancer can cause the discharge of mucus from the anus in some cases. However, it should be remembered that most colon cancer is asymptomatic and discovered through age-appropriate screening.

7 Possible Anal Mucous Discharge Conditions

The list below shows results from the use of our quiz by Buoy users who experienced anal mucous discharge. This list does not constitute medical advice and may not accurately represent what you have.


Hemorrhoids, also known as piles, are swollen veins in your anus and lower rectum that can cause pain, itching, and rectal bleeding. Hemorrhoids may be seen or felt on the outside of the anus (external) or may be hidden from view inside of the rectum.

Hemorrhoids are common occurring in 10 million Am...

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Anal fissure

An anal fissure is a break, or tear, in the mucous membrane lining of the anus. The anus is the opening at the end of the digestive tract where stool leaves the body. A fissure is caused primarily by constipation, which leads to straining to pass large hard stools; trauma caused by insertion of objec...

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Genital warts

Genital warts are one of the most common sexually transmitted infections. It is caused by infection by Human Papilloma Virus (HPV). While it cannot be cured, treatment may help.

Rarity: Uncommon

Top Symptoms: small groin lump, skin-colored groin bump, marble sized groin lump, painless groin lump, scaly groin bump

Symptoms that always occur with genital warts: scaly groin bump

Urgency: Primary care doctor

Anal Mucous Discharge Symptom Checker

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Ulcerative colitis

Ulcerative colitis is a chronic, long-term inflammatory disease of the gastrointestinal tract, specifically involving ulcers and sores of the large intestine (colon) and the rectum. Ulcerative colitis often begins gradually and worsens over time with periods of remission interspers...

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New onset crohn's disease

Crohn's disease is an inflammation of the bowel. It is caused by a faulty immune system response which makes the body attack the lining of the intestines.

The disease usually appears before age thirty and can affect anyone. Those with a family history may be most susceptible. Smoking is a known risk factor.

Aggravating factors include stress, poor diet, and nonsteroidal anti-inflammatory drugs such as ibuprofen and aspirin.

Early symptoms usually develop gradually, but can appear suddenly. These include fatigue, loss of appetite, fever, mouth sores, diarrhea, abdominal pain, and blood in stool.

Untreated Crohn's disease can cause ulcers throughout the digestive tract as well as bowel obstruction, malnutrition, and deteriorating general health.

Diagnosis is made through blood test and stool sample test. Colonoscopy, CT scan, MRI, endoscopy, and/or enteroscopy may also be used.

Crohn's disease cannot be cured, but can be managed through reducing the inflammation. Antibiotics, corticosteroids, and immune system suppressors may be tried. Excellent nutrition, vitamin supplements, smoking cessation, and reduction in stress can be helpful.

Rarity: Rare

Top Symptoms: fatigue, stomach bloating, loss of appetite, constipation, abdominal cramps (stomach cramps)

Urgency: Primary care doctor

Anal cancer

Most anal cancers are linked to the human papilloma virus, or HPV. However, many people carry HPV and have no symptoms or illness of any kind.

Most susceptible are men who have sexual contact with men; women who have had cervical cancer; and anyone who has engaged in anal intercourse, had anal warts, or is HIV positive. Smoking and lowered immunity are also factors.

Symptoms include minor anal bleeding and itching, which may be attributed to hemorrhoids; pain or fullness in the anal region; and abnormal anal discharge.

It is important to see a medical provider about these symptoms so that if needed, treatment can begin as soon as possible.

Diagnosis is made through patient history; physical examination; anal swab; and biopsy. CT scan, ultrasound, or endoscopy of the anus may also be done.

Treatment involves some combination of surgery, radiation therapy, and chemotherapy depending on the needs of each individual patient.

Rarity: Rare

Top Symptoms: abdominal pain (stomach ache), stool changes, constipation, diarrhea, pain when passing stools

Urgency: Primary care doctor

Side-effect(s) of radiation therapy to the pelvis

Radiation therapy is a common treatment for cancer and more than half of cancer patients will undergo a form of this treatment. The radiation attacks cell DNA in order to prevent the cells from growing more and kills them.

Rarity: Rare

Top Symptoms: vaginal discharge, fatigue, nausea or vomiting, urinary changes, constipation

Symptoms that always occur with side-effect(s) of radiation therapy to the pelvis: currently undergoing radiation therapy to the pelvis

Urgency: Primary care doctor

When and How to Treat Anal Mucous Discharge

In the majority of cases, anal mucus discharge is transient (e.g. temporary and short-lived) and will resolve on its own. It is frequently caused by infections with some sort of stomach pathogen. Sometimes, these pathogens can cause other symptoms like abdominal cramps, nausea, or vomiting, but they may also cause limited symptoms like small amounts of blood or mucus in the stool.

At-home treatment

If your anal mucous discharge is sudden and has never happened before, it is reasonable to assume it is from some sort of infection. Infections usually resolve in two weeks or less unless you have a weakened immune system. Therefore, for a person with a healthy, immune system, staying hydrated, resting, and washing hands to prevent re-infection are important treatments.

When to see a doctor

The following situations require medical care from your physician. Make an appointment promptly if you experience the following.

  • If you cannot stay hydrated or take in any nutrients: You may need to seek care at an emergency room or seek evaluation from your physician.
  • If the mucus or blood in stool gets worse or does not improve: Especially after a week to 10 days, or if it recurs in the absence of the food, you should seek evaluation for a more chronic cause of rectal discharge.
  • If your anal mucous discharge recurs or never resolves: Especially in the absence of a possible infection, you should seek medical evaluation to determine if you have a chronic inflammatory condition of the bowel (e.g. Crohn Disease, Ulcerative Colitis, Inflammatory Bowel Disease, or rarely Celiac Disease) and to rule out cancer.

When it is an emergency

You should seek help without delay if you experience the following.

  • You have blood in your stool: Or if you have difficulty staying hydrated or drinking enough fluids to replace what you are losing during the day.
  • Signs of cancer or chronic bowel inflammation: Signs include night sweats, back pain, or fatigue.

FAQs About Anal Mucous Discharge

Is anal mucous discharge normal?

Anal mucous discharge is not normal; however, it may resolve spontaneously on its own. Unless it is accompanied by fever, nausea, vomiting, diarrhea, blood in the stool, or belly pain, it is likely not worrisome. Additionally, if anal mucous persists, medical evaluation may be necessary.

How long does anal mucous discharge usually last?

Anal mucous discharge is commonly caused by transient gastrointestinal illness. In healthy individuals with well-functioning immune systems, anal mucous discharge usually does not last longer than 10 days and likely lasts less. If anal mucous discharge lasts longer than 10 days, it may be necessary to seek medical evaluation to assess whether your immune system is functioning well and for an evaluation of your gastrointestinal system to assess for inflammatory bowel disease.

What causes anal mucous discharge?

Anal mucous discharge is primarily caused by inflammation triggering mucus production from cells called "goblet cells" in the intestine. It can be caused by the ingestion of something that causes inflammation, inflammatory conditions in the gut, or systemic inflammation that causes excess mucous throughout the gut.

How should I recognize anal mucous discharge?

Anal mucous discharge is often recognized by mucus in the stool. Mucous looks like phlegm or snot and is often found either by itself or mixed in with stool. Additionally, you may notice a phlegm-like jelly substance when wiping after defecating which you may recognize as mucus. It is important to recognize other signs that may be worrisome such as blood or even organisms like parasites within the mucus. If the mucus persists you should seek medical attention.

How is anal mucous discharge usually treated?

Treatment for anal mucous discharge depends on the cause. If the discharge is caused by a bacterium, parasite, or other infection, it can often be treated by an antibiotic, anti-parasite, or antiprotozoal medication. If the mucus is caused by some sort of inflammatory process, then medications to treat the cause of inflammation or the inflammation itself may be used. Depending on the cause, which can be determined by a medical professional, diet restriction or potent anti-inflammatory medications may be necessary.

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Anal Mucous Discharge Symptom Checker Statistics

People who have experienced anal mucous discharge have also experienced:

  • 8% Constipation
  • 8% Abdominal Pain (Stomach Ache)
  • 6% Rectal Bleeding

People who have experienced anal mucous discharge were most often matched with:

  • 60% Genital Warts
  • 20% Hemorrhoids
  • 20% Anal Fissure

Source: Aggregated and anonymized results from visits to the Buoy AI health assistant (check it out by clicking on “Take Quiz”).

Anal Mucous Discharge Symptom Checker

Take a quiz to find out what might be causing your anal mucous discharge


  1. Sainsbury A, Sanders DS, Ford AC. Prevalence of irritable bowel syndrome-type symptoms in patients with celiac disease: A meta-analysis. Clin Gastroenterol Hepatol. 2013;11(4):359-65.e1. PubMed Link
  2. Longstreth GF, Thompson WG, Chey WD, Houghton LA, Mearin F, Spiller RC. Functional bowel disorders. Gastroenterology. 2006;130(5):1480-1491. PubMed Link
  3. Moleski SM. Irritable Bowel Syndrome (IBS). Merck Manual Consumer Version. Reviewed March 2017. Merck Manuals Consumer Version Link
  4. Signs and Symptoms of Anal Cancer. American Cancer Society. Updated Nov. 13, 2017. American Cancer Society Link

Disclaimer: The article does not replace an evaluation by a physician. Information on this page is provided as an information resource only, and is not to be used or relied on for any diagnostic or treatment purposes.