CONDITION

Rectal Prolapse

Rectal prolapse describes a situation in which part of the lining of the rectum protrudes through the anus, appearing as a visible, often cylindrical or rounded mass of pink or red tissue. It can occur as an isolated event or develop gradually, and tends to be associated with conditions that cause repeated straining—such as ongoing diarrhoea, constipation, or certain urinary or reproductive problems. Owners most often notice a fleshy tissue emerging from the back passage, which may appear after defaecation or straining, and in some cases may retract on its own or remain visible. The tissue can become swollen, darker in colour, or dry if it stays outside for a period of time. Young animals and those with chronic bowel issues are more commonly affected, though it can appear at any age. This page explores what owners may observe at home, what processes underneath tend to contribute to prolapse, how the condition is assessed, and what approaches exist for managing both the immediate presentation and any underlying cause.

Why this matters now

Rectal prolapse tends to appear most frequently in young animals—particularly puppies and kittens under six months of age—whose supporting tissues may be less mature and more susceptible to displacement under strain. It can also occur in older animals with chronic gastrointestinal conditions, parasitic infections, or any disease process that triggers repeated episodes of diarrhoea or constipation. Certain breeds with a predisposition to bowel disorders or anatomical variations in pelvic structure may experience prolapse more often, though no breed is entirely exempt. Seasonal patterns sometimes emerge when parasitic loads increase or when dietary changes during weaning introduce digestive upset.

The prolapse may initially appear as a small, intermittent protrusion that retracts on its own once the triggering episode of straining has passed. In some individuals, the tissue begins to emerge more frequently or remains outside for longer periods, particularly if the underlying cause—such as ongoing diarrhoea or urinary straining—continues unchecked. Over time, tissue that remains prolapsed can become swollen, congested, or damaged by exposure and contact with the environment, which may in turn make spontaneous retraction less likely. The pace of progression varies widely: some animals experience a single brief episode that resolves, while others develop a persistent or recurrent pattern.

Signals & patterns

Early signals

Visible tissue after defaecation

An owner may notice a small, moist, pink or red mass protruding from the anus after the pet has passed stool, which may retract back inside within minutes or hours. This tissue often appears smooth and rounded, resembling a small swelling or bulge at the anal opening.

Repeated licking at the hindquarters

The animal may lick, scoot, or show discomfort around the anal area, particularly after defaecation or when the tissue has emerged. This behaviour reflects local irritation or the sensation of something being out of place.

Straining during bowel movements

Owners often observe the pet adopting a posture to defaecate repeatedly, producing little or no stool, or appearing to push forcefully even after passing faeces. This pattern of straining can be both a contributor to prolapse and a sign that something is driving the behaviour—such as diarrhoea, constipation, or discomfort lower in the digestive tract.

Moist or mucoid discharge

A small amount of mucus or moisture may be visible around the anus or on the hair nearby, sometimes tinged with blood. This discharge can accompany the intermittent protrusion of rectal tissue and reflects irritation or inflammation of the lining.

Later signals

Persistent or enlarging mass

The prolapsed tissue may remain outside most or all of the time, and can increase in size as swelling develops. The tissue may change colour from pink to darker red or purple as congestion worsens, and the surface can become dry or develop small areas of damage.

Reduced appetite or lethargy

Some animals become less interested in food or less active, particularly if the prolapse is painful, if there is significant inflammation, or if the underlying disease—such as severe gastrointestinal upset or parasitic burden—is affecting overall wellbeing.

Bleeding from the anus

Blood may appear on the surface of the prolapsed tissue, in the stool, or on the ground where the animal has been sitting. This bleeding can result from trauma to the exposed tissue, from the original disease process, or from the animal's attempts to clean the area.

Click to read about the biological mechanisms

How this is usually investigated

Investigation of rectal prolapse typically begins with a history that explores the pattern of straining, bowel movements, and any recent digestive or urinary changes. Direct observation of the prolapsed tissue allows assessment of its extent, colour, and condition, and helps distinguish rectal prolapse from other structures that may protrude through the anus. Further tests are then selected based on the clinical picture, with the aim of identifying any underlying cause that may have triggered the repeated straining.

Physical examination

Purpose: The clinician inspects the prolapsed tissue to assess its size, viability, and whether it involves only the mucosal lining or deeper layers of the bowel wall. Gentle palpation and observation during a natural episode of straining can help clarify the extent of the displacement.
Considerations: If the tissue has retracted by the time of the visit, the examination may not reveal the full picture. Sedation is sometimes used to allow thorough assessment without distress, particularly in younger or more anxious animals.

Faecal analysis

Purpose: Microscopic examination and flotation techniques can identify parasites, bacterial overgrowth, or protozoal infections that may be contributing to diarrhoea and straining. Some laboratories also offer tests for specific enteric pathogens.
Considerations: A single negative sample does not rule out intermittent shedding of parasites, and multiple samples collected over several days may be more informative. The test does not reveal non-infectious causes of straining, such as anatomical or metabolic issues.

Rectal examination

Purpose: A digital or instrument-assisted examination of the rectum and pelvic canal can identify masses, strictures, foreign material, or other abnormalities that may be triggering straining. It also allows assessment of the tone and integrity of the anal sphincter.
Considerations: The procedure can be uncomfortable and may require sedation or anaesthesia, particularly in smaller or more sensitive animals. It provides information about the immediate area but does not visualise the entire gastrointestinal tract.

Imaging

Purpose: Radiography or ultrasonography of the abdomen and pelvis can reveal anatomical abnormalities, masses, or signs of obstruction or inflammation in the bowel or urinary tract that may be contributing to straining. Contrast studies may be used to outline the bowel lining in more detail.
Considerations: Imaging is most useful when the history or examination suggests a structural problem or when initial treatments have not resolved the straining. It does not always detect functional or microscopic causes of diarrhoea.

Blood tests

Purpose: Biochemistry and haematology panels can identify systemic conditions—such as electrolyte imbalances, kidney disease, or signs of infection—that may be associated with chronic diarrhoea or straining. They also help assess the overall health of the animal before any intervention.
Considerations: Blood tests provide context rather than a direct diagnosis of prolapse, and results are most informative when interpreted alongside other findings. Normal results do not exclude a localised bowel problem.

Options & trade-offs

Management of rectal prolapse usually involves addressing both the prolapsed tissue itself and any underlying cause that has triggered the straining. Different combinations of supportive care, manual reduction, and surgical intervention may be appropriate depending on the individual animal's situation, the chronicity of the problem, and what proves practical in the home environment. What works well for one household may be less feasible for another, and approaches are often adjusted over time as the response becomes clearer.

Manual reduction and topical care

The prolapsed tissue is gently cleaned and lubricated, then carefully pushed back into its normal position, often after applying a topical agent to reduce swelling. A temporary purse-string suture may be placed around the anus to support the tissue while it heals and to reduce the risk of immediate re-prolapse. Topical treatments and protective dressings can help maintain tissue moisture and reduce inflammation.

Trade-offs: This approach is often used for recent, uncomplicated prolapses and can be effective if the underlying cause is identified and managed. Recurrence is common if straining continues, and repeated episodes may lead to more severe tissue damage or require a different strategy.

Surgical fixation

A procedure is performed to anchor the rectal wall to surrounding tissues or the body wall, reducing the likelihood of future prolapse. Techniques vary and may involve suturing the bowel to stable structures within the pelvis or abdomen. Anaesthesia and a period of postoperative care are required, and activity restriction is typically advised during healing.

Trade-offs: Surgical fixation may reduce recurrence more reliably than manual reduction alone, particularly in animals with repeated episodes or when underlying causes cannot be fully resolved. It carries the risks associated with any surgical procedure, including infection, suture complications, and the need for careful postoperative monitoring.

Management of underlying gastrointestinal conditions

Identifying and treating parasites, bacterial infections, dietary intolerances, or inflammatory bowel conditions can reduce the frequency and severity of diarrhoea or straining, thereby lowering the mechanical forces that trigger prolapse. This may involve antiparasitic medications, dietary modification, probiotics, or anti-inflammatory agents, tailored to the specific findings from diagnostic tests.

Trade-offs: Addressing the root cause is often central to preventing recurrence, but some conditions may take time to respond or may not resolve completely. In cases where no clear underlying cause is found, empirical treatments may be trialled with variable results.

Supportive care and environmental modification

Stool softeners, adequate hydration, and dietary adjustments can reduce the effort required during defaecation, lessening the strain on the rectum. Ensuring a calm, clean toileting area and minimising factors that cause stress or delay defaecation may also help prevent recurrence. Close observation allows early detection of any repeat episodes.

Trade-offs: Supportive measures can be useful as part of a broader strategy and are often well tolerated, but they may not prevent prolapse on their own if significant underlying pathology remains. The effectiveness depends on the owner's ability to implement changes consistently and the animal's individual response.

Resection of damaged tissue

If the prolapsed tissue has become severely swollen, necrotic, or damaged beyond recovery, surgical removal of the affected section may be necessary. The healthy bowel is then sutured to the anal opening, preserving continuity. Anaesthesia and careful postoperative care are required, and healing typically takes several weeks.

Trade-offs: Resection is generally reserved for situations where the tissue is no longer viable or when other approaches have failed. It carries the risks of any abdominal surgery, including infection, dehiscence, and temporary changes in bowel function during the recovery period.

Common misconceptions

Misconception:

"A prolapse that retracts on its own does not need attention."

Reality:

Tissue that has prolapsed once can prolapse again, particularly if the underlying cause of straining persists. Spontaneous retraction is a positive sign in the moment, but it does not address the factors that led to the displacement, and recurrent episodes can lead to progressively more severe tissue damage and a higher likelihood of complications over time.

Misconception:

"Surgery always fixes the problem permanently."

Reality:

Surgical fixation or resection can reduce the risk of recurrence, but outcomes depend on whether the underlying cause of straining can be managed. In some animals, straining continues after surgery due to ongoing gastrointestinal or urinary issues, and repeat prolapse or other complications may still occur. Surgery is one component of a broader management plan rather than a standalone solution.

Misconception:

"Rectal prolapse only happens in very young animals."

Reality:

While puppies and kittens are at higher risk due to less developed supporting tissues, rectal prolapse can occur at any age. Older animals with chronic bowel disease, tumours, or urinary conditions that cause straining are also affected, and the underlying causes and management considerations may differ significantly between age groups.

Related conditions

Colitis

Colitis can lead to rectal prolapse when persistent inflammation in the large intestine causes frequent straining during defaecation. The two conditions often share common underlying triggers, such as chronic diarrhoea or parasitic infection.

Urinary Incontinence

Constipation and megacolon may contribute to rectal prolapse through repeated straining efforts to pass hard or retained faeces. Both conditions involve disruption of normal bowel function and can occur together in animals with chronic lower bowel issues.

Constipation and Megacolon in Cats

Constipation and megacolon in cats can lead to rectal prolapse when prolonged straining to pass faeces exerts pressure on the rectal lining. Managing the underlying motility or obstruction issue often becomes part of addressing the prolapse itself.

Vaginal Hyperplasia

Vaginal hyperplasia shares with rectal prolapse the pattern of tissue protruding through a body opening in response to hormonal or mechanical influences. Both involve visible swelling of mucosal tissue and may appear or worsen during straining, though they affect different anatomical sites.

Intestinal Intussusception

Intestinal intussusception can sometimes occur alongside rectal prolapse in young animals or those with conditions that cause abnormal intestinal movement. Both involve displacement of bowel tissue and may share underlying risk factors such as severe diarrhoea or parasitism.

Rectal prolapse often prompts a broader look at digestive health, particularly if episodes recur or if the initial investigation reveals an underlying bowel or parasitic condition. The metabolic health pillar explores related topics such as chronic diarrhoea, parasitic infections, and the interplay between diet and bowel function. Understanding the patterns that trigger straining can be a useful part of conversations at routine appointments or when planning longer-term care.