Rectal discharge

Key takeaways

Rectal discharge belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Rectal discharge to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Rectal discharge from memory before moving on to harder problems.

Reference excerpt

Rectal discharge is intermittent or continuous expression of liquid from the anus (per rectum). Normal rectal mucus is needed for proper excretion of waste. Otherwise, this is closely related to types of fecal incontinence (e.g., fecal leakage) but the term rectal discharge does not necessarily imply degrees of incontinence. Types of fecal incontinence that produce a liquid leakage could be thought of as a type of rectal discharge.

Types Different types of discharge are described. Generally "rectal discharge" refers to either a mucous or purulent discharge, but, depending upon what definition of rectal discharge is used, the following could be included:

Purulent rectal discharge Mucous rectal discharge (mucorrhea) Watery rectal discharge Steatorrhoea ("fatty diarrhea" caused by excess fat in stools, or an oily anal leakage) Keriorrhea (orange oily anal leakage caused by high levels of escolar and oilfish in the diet) Rectal bleeding, melena and hematochezia Feculent rectal discharge (fecal rectal discharge), e.g. fecal leakage, encopresis and incontinence of liquid stool elements Diarrhea

Symptoms There are many different types of rectal discharge, but the most common presentation of a discharge is passage of mucus or pus wrapped around an otherwise normal bowel movement. Rectal discharge has many causes, and may present with other symptoms:

Staining of undergarments Constant feeling of dampness around anus Frequent urge to open bowels, but passage of only small amounts of mucus or pus-like liquid rather than normal feces Rectal pain Rectal malodor, when the discharge is foul-smelling, e.g. associated with certain infections Pruritus ani Rectal bleeding Perianal erythema, swelling and tenderness

Purulent rectal discharge (suppurative discharge) Pus usually indicates infection. Frequently medical sources do not differentiate between the two types of discharge, instead using the general term mucopurulent discharge, which, strictly speaking, should only be used to refer to a discharge that contains both mucus and pus. Purulent discharges may be blood-streaked.

Mucous rectal discharge (mucinous rectal discharge, mucoid rectal discharge, mucorrhea) Mucus coats the walls of the colon in health, functioning as a protective barrier and also to aid peristalsis by lubrication of stool. Mucous discharges can be thought of in three broad categories:

Normal physiologically produced mucus Inappropriately expressed physiologically produced mucus (e.g. in the presence of sphincter defects, or lesions preventing normal sphincter closure, allowing seepage or soiling) Mucus produced in pathological quantities (e.g. from a lesion, or generalized coloproctitis or as a result of bacterial overgrowth) A mucous rectal discharge may be blood-streaked. With some conditions, the blood can be homogenously mixed with the mucus, creating a pink goo. An example of this could be the so-called "red currant jelly" stools in intussusception. This appearance refers to the mixture of sloughed mucosa, mucus, and blood. Note: "mucus" is a noun, used to name the substance itself, and "mucous" is an adjective, used to describe a discharge. "Mucoid" is also an adjective and means mucus-like. "Mucinous" strictly speaking refers to something having a mucin-like attribute, but it often is used interchangeably with the word "mucous" (as mucus usually contains a high percentage of mucin).

Differential diagnosis The differential diagnosis of rectal discharge is extensive, but the general etiological themes are infection and inflammation. Some lesions can cause a discharge by mechanically interfering with, or preventing the complete closure of, the anal canal. This type of lesion may not cause discharge intrinsically, but instead, allow transit of liquid stool components and mucus.

Common causes include: haemorrhoids, proctitis, anal fissure, rectal prolapse, perianal warts (anal condyloma acuminatum), Less common causes include: colorectal carcinoma, irritable bowel syndrome, solitary rectal ulcer syndrome, anal fistulae, villous adenoma, poor anal hygiene Rare causes include: sexually transmitted diseases (e.g. syphilis, rectal gonorrhea, chlamydia), anal carcinoma, AIDS, rectal foreign body, bowel obstruction, rectocele, enterocele, ulcerative colitis, bacterial colitis (e.g. syphilitic colitis), anal/perianal tuberculosis, perianal abscess (when ruptured). Perianal Crohn's disease is associated with fistulizing, fissuring and perianal abscess formation. After colostomy, the distal section of bowel continues to produce mucus despite fecal diversion, often resulting in mucinous discharge. Occasionally, intestinal parasitic infection can present with discharge, for example whipworm.

Perianal discharge

Several pathologies can present with perianal discharge. Although not exactly the same as rectal discharge, perianal discharge can be misinterpreted as such, given the anatomical proximity. Fistulae draining into the perianal region, as well as pilonidal diseases, are the main entities that fall within this category. Perianal tumours can also discharge when they fungate or otherwise become cystic or necrotic.

Causes

Proctitis

Proctitis is inflammation of the lining of the rectum including the distal 15 cm (6 in) of the rectum. Proctitis has many causes. Common infection causes include: sexual intercourse with someone who has a sexually transmitted disease (STD), infection from a foodborne illness, and strep throat (in children). Proctitis may also be caused by some types of inflammatory bowel disease, radiation therapy, injury to the rectum or anus, or some types of antibiotic. Tuberculosis proctitis can create a mucous discharge.

Infections

Anal warts (condyloma acuminatum, anogenital warts)

Anal warts are irregular, verrucous lesions caused by human papilloma virus. Anal warts are usually transmitted by unprotected, anoreceptive intercourse. Anal warts may be asymptomatic, or may cause rectal discharge, anal wetness, rectal bleeding, and pruritus ani. Lesions can also occur within the anal canal, where they are more likely to create symptoms.

Chlamydia

… excerpt ends here. Continue reading the full article.

Worked examples

Example 1 — a first encounter with Rectal discharge

Start with the simplest possible case. Write down what Rectal discharge claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Rectal discharge before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Rectal discharge ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Rectal discharge

In research: Rectal discharge appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Rectal discharge in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Rectal discharge is common in secondary-school and first-year university syllabi. It links to neighbouring topics Colorectal surgery, Gastroenterology, Medical diagnosis, so understanding it makes those chapters shorter.
In everyday life: Look for Rectal discharge outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

How to study Rectal discharge in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Rectal discharge means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Rectal discharge out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Rectal discharge in simple terms?

Rectal discharge is intermittent or continuous expression of liquid from the anus (per rectum). Normal rectal mucus is needed for proper excretion of waste.

Why does Rectal discharge matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Rectal discharge?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Rectal discharge.