Rectal Discharge

Rectal discharge is any fluid from the back passage that is not stool. It may be clear, white, yellow, or green, and can sometimes contain blood.

You may also notice:

• Itching, soreness, or irritation around the anus
• Pain or discomfort, especially during bowel movements
• A frequent urge to pass stool (tenesmus)
• A feeling of pressure or fullness in the rectum
• Small amounts of blood on toilet paper or underwear

Some infections or inflammatory conditions can cause discharge with few or no other symptoms.

Yes. Rectal discharge may be mild and the only symptom, and in some cases there may be no other noticeable symptoms.

This is common with certain infections, where discharge is only noticed when wiping or on underwear.

Rectal discharge usually appears as mucus or fluid that is separate from stool.

It may be:

• Clear, white, or cloudy with a jelly-like consistency
• Yellow or green and thicker (pus-like)
• Watery or mixed with small streaks of blood

The appearance can vary depending on the cause.

Rectal discharge can affect anyone.

It is more commonly seen in people who have receptive anal sex, particularly where sexually transmitted infections are a risk. However, it can also occur with non-sexual conditions such as bowel inflammation, haemorrhoids, or anal fissures.

If caused by an untreated infection or ongoing inflammation, rectal discharge can lead to complications.

These may include:

• Persistent inflammation (proctitis)
• Narrowing of the rectum (strictures)
• Abscess formation or fistulas
• Increased risk of acquiring or transmitting infections
• Spread of infection in more severe cases

Early assessment helps reduce these risks.

The timing depends on the cause.

Symptoms may develop within a few days to a few weeks after exposure to an infection, but some people may not develop symptoms at all.

Rectal discharge is usually caused by inflammation of the rectum (proctitis).

Common causes include:

• Sexually transmitted infections (especially chlamydia and gonorrhoea)
• Other infections such as herpes or syphilis
• Inflammatory bowel conditions like ulcerative colitis or Crohn’s disease
• Local conditions such as haemorrhoids or anal fissures

Several sexually transmitted infections can cause rectal discharge.

The most common are:

• Chlamydia (including lymphogranuloma venereum or LGV)
• Gonorrhoea

Other possible causes include:

• Herpes simplex virus
• Syphilis
• Mycoplasma genitalium

Testing is needed to confirm the exact cause, as symptoms can be similar.

Hormonal changes are not a common cause of rectal discharge.

A rare exception is endometriosis affecting the bowel, which can cause cyclical rectal symptoms (such as discharge or bleeding) linked to the menstrual cycle.

Some gynaecological conditions can affect the rectum and lead to discharge.

These include:

• Endometriosis involving the bowel
• Rectovaginal fistula (an abnormal connection between the vagina and rectum)
• Pelvic inflammatory disease (less commonly)
• Advanced pelvic cancers affecting the bowel

Urological causes are uncommon but may contribute in certain cases.

Examples include:

• Prostatitis, which may cause overlapping pelvic symptoms
• Fistulas between the urinary tract and bowel

Some infections may affect both the urinary and rectal areas.

Conditions affecting the anal skin or rectal lining can cause discharge.

These include:

• Proctitis (infective or inflammatory)
• Anal warts (HPV)
• Herpes simplex infection with ulceration
• Perianal Crohn’s disease with fistulas
• Hidradenitis suppurativa
• Severe dermatitis or psoriasis

Some habits can irritate the rectum and contribute to discharge.

These include:

• Use of scented or harsh products around the anal area
• Frequent rectal douching
• Anal sex without adequate lubrication
• Poor hygiene of sex toys

These factors may increase irritation or infection risk.

Prevention focuses on reducing infection risk and avoiding irritation:

• Use condoms for anal sex
• Use adequate lubricant to reduce trauma
• Attend regular sexual health screening, especially with new or multiple partners
• Avoid harsh products and excessive douching
• Keep vaccinations up to date (e.g. hepatitis A, hepatitis B, HPV)

Prevention focuses on reducing infection risk and avoiding irritation.

This includes:

• Using condoms during anal sex
• Using adequate lubricant to reduce injury
• Regular sexual health testing, especially with new or multiple partners
• Avoiding harsh products or excessive douching
• Keeping vaccinations up to date (e.g. hepatitis A, hepatitis B, HPV)

Diagnosis involves a clinical assessment and targeted testing.

A clinician will take a focused history (symptoms, timing, sexual exposure) and examine the area. A rectal swab is typically performed to test for infections, with additional tests arranged based on findings.

The main test is a rectal swab, usually analysed with nucleic acid amplification tests (NAATs) to detect infections such as chlamydia and gonorrhoea.

Other tests may include:

• Blood tests for infections such as syphilis and HIV
• Swabs of visible lesions (e.g. for herpes simplex virus)
• Proctoscopy to assess the rectal lining
• Stool tests if a gastrointestinal cause is suspected

A clear history combined with appropriate testing is essential.

Helpful information includes:

• When symptoms started and how they have changed
• The appearance of the discharge
• Associated symptoms (pain, bleeding, itching, tenesmus)
• Recent sexual activity and exposure risks
• Past medical conditions, especially bowel disease

Yes. Several conditions can cause similar symptoms or be mistaken for rectal discharge.

These include:

• Haemorrhoids
• Anal fissures
• Fistulas
• Inflammatory bowel disease (e.g. Crohn’s disease or ulcerative colitis)
• Perianal skin conditions or irritation

Yes. Further investigations may be used depending on the suspected cause:

• Proctoscopy or sigmoidoscopy to assess the rectum
• Blood tests for infection or inflammation
• Stool tests for gastrointestinal causes

No. A physical examination can identify signs of inflammation or lesions, but it cannot confirm the exact cause.

Laboratory tests, such as swabs, are usually required for a definitive diagnosis.

No. The cause cannot be reliably identified without medical assessment.

Different conditions can cause similar symptoms, and accurate testing is needed to guide appropriate treatment.

Yes. Rectal discharge can usually be treated once the underlying cause is identified.

Treatment depends on the cause, which may include infections or inflammatory conditions. Appropriate testing is important to guide the correct treatment.

Treatment depends on the diagnosis.

Common treatments include:

• Antibiotics for bacterial infections (e.g. chlamydia, gonorrhoea)
• Antiviral medication for herpes simplex virus
• Anti-inflammatory treatment for conditions such as inflammatory bowel disease

The exact treatment and duration vary depending on the cause.

Treatment duration varies depending on the cause.

Some infections are treated with a single dose, while others require a course lasting several days or weeks. Symptoms often improve before treatment is complete, but medication should always be finished as prescribed.

In many cases, yes.

Bacterial infections are usually fully cured with appropriate treatment. Viral or inflammatory conditions may not be “cured” but can be effectively managed to control symptoms and reduce recurrence.

Sexual partners should be tested and treated if a sexually transmitted infection is identified or suspected.

This helps prevent reinfection and reduces onward transmission. It is advisable to avoid sexual contact until both you and your partner(s) have completed treatment and symptoms have resolved.

The outlook is generally good when the underlying cause is identified and treated early.

Most infections resolve completely with appropriate treatment. If left untreated, complications such as persistent inflammation (proctitis), scarring, or changes in bowel function may occur.

No. Treatment clears the infection but does not provide immunity.

It is possible to become infected again if exposed in the future.

Prevention focuses on reducing infection risk and avoiding irritation.

This includes:

• Using condoms during anal sex
• Ensuring partners are tested and treated where appropriate
• Attending regular sexual health screening
• Avoiding practices that may irritate the rectum (e.g. harsh products or excessive douching)

If the cause is a sexually transmitted infection, it is recommended to inform recent sexual partners.

This allows them to be tested and treated if needed, helping prevent reinfection and further transmission.

If the cause is non-infectious (e.g. haemorrhoids or inflammatory bowel disease), partner notification is not required.

Rectal discharge is not a typical pregnancy symptom and should be assessed.

Risks depend on the underlying cause, particularly if an infection is present and untreated. These may include:

• Preterm birth or premature rupture of membranes
• Transmission of certain infections during delivery
• Effects on the baby’s health, depending on the specific infection

Early assessment and treatment significantly reduce these risks.

Rectal discharge is not common in pregnancy.

Mild symptoms may occur with haemorrhoids, which are more frequent during pregnancy. However, persistent or unusual discharge usually suggests another condition that requires assessment.

Yes. Most underlying causes can be treated safely during pregnancy.

Appropriate antibiotics, antivirals, or other treatments can be selected to protect both you and your baby. The choice depends on the diagnosis and stage of pregnancy.

The most important step is early assessment of symptoms.

Additional precautions include:

• Using condoms during sexual activity
• Ensuring partners are tested and treated if appropriate
• Attending routine antenatal care
• Avoiding practices that may irritate the area

Rectal discharge itself does not directly affect breastfeeding.

However, untreated infection or ongoing symptoms may affect comfort and recovery after birth. Most treatments can be selected to be safe during breastfeeding.