Snake prolapse: tissue at the vent and the first hour

Quick answer

Tissue hanging out of a snake's vent is an emergency measured in hours, not days. Exposed tissue dries, swells, loses its blood supply and dies, and the difference between a snake that keeps that tissue and one that has it surgically removed is usually how quickly it got to a vet.

The single most important thing you can do at home is keep the tissue wet and clean, and get every scrap of loose substrate away from it. The single most damaging thing you can do is try to push it back in.

• Do not attempt to reduce a prolapse yourself. Pushing tissue back through a swollen opening tears it.
• Move the snake immediately onto damp paper towel in a clean, smooth-sided container.
• Keep the exposed tissue moist with sterile saline or clean lukewarm water at all times.
• Photograph it before you travel. What type of tissue it is changes the treatment.
• A prolapse is a symptom. Something made the snake strain, and that cause has to be found too.

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Never push a prolapse back in, and never apply anything to it on your own initiative.

The opening is already swollen and the tissue is already fragile. Forcing it back tears the wall, and a tear that goes through into the body cavity turns a treatable problem into peritonitis. Sugar and honey are genuine veterinary techniques for drawing fluid out of swollen tissue, but they are used under direction and after the tissue has been identified. Applied blind at home, they can make the wrong situation worse and they contaminate the field the surgeon has to work in.
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Decide in 60 seconds

What is actually coming out

Identifying the tissue matters because the treatment differs, and a photograph taken at home is often clearer than anything the vet can see once the snake is stressed and the tissue has swollen further.

Hemipenal prolapse.

Males only. The hemipenes sit inverted in the base of the tail and are everted for mating. One or both can fail to retract afterwards, or after a struggle, or because of infection or a plug of dried secretion in the sheath.

The giveaway is position and appearance. The tissue emerges behind the vent rather than from it, it is often paired or clearly one of a pair, and in many species it carries obvious ornamentation such as spines or lobes.

A snake can live a normal life with one hemipenis surgically removed, so even the worst outcome here is usually compatible with a full recovery.

Cloacal prolapse.

The lining of the cloaca itself turns outward. It appears at the vent as a red or pink ring, often described as a doughnut, without a central tube.

Colonic or intestinal prolapse.

The most serious. A length of gut has been pushed out, so what you see is a tube with a visible lumen at the end. It is often darker, and it deteriorates fastest because a length of bowel is being deprived of its blood supply.

Oviductal prolapse.

Females, usually around or after laying. It also appears as a tube with a lumen and is a serious emergency because it often accompanies dystocia.

Things that are not a prolapse.

Male snakes sometimes evert a hemipenis briefly during defecation, during handling, or while being restrained, and it retracts within a short time. That is not a prolapse and does not need treatment, though it is worth watching to be sure it goes back.

A ring of retained shed around the vent can look like a raised rim of tissue. So can a firm plug of hardened secretion inside a hemipenal sheath, which is a recognised problem in its own right. Abscesses and masses near the vent can also mimic it. If in doubt, photograph and let a vet decide rather than pulling at anything.

Loose substrate like this is exactly what must be removed the moment a prolapse appears. Every particle that sticks to exposed tissue is a source of infection.

Why it happened

A prolapse is almost never a primary event. Something made the snake strain hard enough or long enough to push tissue out, and the same cause will do it again if it is not found.

Constipation and impaction.

The most common driver. Causes include a cool enclosure that has slowed transit, dehydration, ingestion of particulate substrate, prey that was too large, and feeding again before the previous meal has passed.

Temperature.

Digestion in a snake is entirely temperature dependent. A snake kept below its preferred range cannot move a meal through, and the strain that follows is mechanical. This is why the first question a reptile vet asks is what the enclosure temperatures actually measure.

Dehydration and low humidity.

Dry, hard faeces and urates require more straining, and a species kept below its humidity requirement is also more prone to shedding problems that compound the picture.

Parasites and gastrointestinal infection.

Nematodes, protozoa and cryptosporidiosis all cause chronic straining, poor condition and abnormal droppings. This is one reason a faecal sample belongs in the appointment.

Reproductive causes.

Egg binding and difficult laying in females, and over-breeding or hemipenal infection in males.

Weakness and neurological disease.

Poor muscle tone from severe nutritional deficiency, or a neurological problem, reduces the animal's ability to hold tissue in place.

Masses.

A tumour or granuloma near the cloaca changes the mechanics and can cause chronic straining.

The first hour, step by step

Stop everything and set up a clean container.

A smooth-sided plastic tub with a secure lid and ventilation holes. Line it with plain white paper towel, dampened with clean lukewarm water. Nothing loose, nothing fibrous, nothing coloured. This step matters more than it sounds: the substrate is what turns a recoverable prolapse into a contaminated one.

Move the snake carefully, supporting the whole body.

Support the length of the animal and avoid any pressure on the tail base or the abdomen. Do not let the prolapsed tissue drag along a surface.

Keep the tissue wet.

Sterile saline is ideal and is available from any pharmacy. Clean lukewarm water is an acceptable substitute. Drip it over the tissue, or lay a saline-soaked piece of gauze over it, and keep repeating. Drying is what kills exposed mucosa, and it happens quickly.

Rinse away debris, gently.

If substrate is stuck, flood it off with saline. Do not rub, wipe, pick or scrub.

Remove any cagemates and put the snake somewhere it cannot rub.

Snakes in shared enclosures have been attacked at the prolapse by their cagemate. Snakes on their own will sometimes rub or bite at the tissue.

Keep the snake at the warm end of its normal range, not warmer.

The temptation is to warm the animal up. Resist going above the species' normal preferred range: overheating adds a second emergency. A gentle warm end in the transport tub is enough.

Do not feed, and do not soak the snake in a bath.

A full soak sounds helpful and is not. It does not keep tissue selectively moist, it stresses the animal, and it risks the snake sitting in contaminated water.

Photograph it.

Two or three clear pictures with good light, from the side and from behind, with the vent visible. This helps the vet identify the tissue before the swelling advances.

Phone ahead.

Say the species, the sex if known, that there is prolapsed tissue at the vent, how long it has been out, and what colour it is. The last of those decides how urgently they need to see you.

What never to do

Do not push the tissue back in.

Do not pull, twist or cut anything.

Do not apply antiseptic, iodine, human antibiotic cream, petroleum jelly, or any oil.

Do not apply sugar or honey unless a vet has told you to do it and told you how.

Do not put the snake back on wood chip, bark, aspen, sand, coir or any other loose substrate.

Do not offer food. A snake with a prolapse is not going to move a meal through, and feeding adds bulk to a system that is already obstructed.

Do not wait to see if it goes back on its own. Brief eversions during defecation resolve in minutes. Anything still out after that is not going to resolve itself, and every hour of delay costs tissue.

Do not treat it as a shedding problem and soak it. Retained shed and prolapse both cause a raised rim at the vent, and the treatments are opposite.

After treatment

Expect the vet to identify the tissue, clean it, reduce it under sedation or anaesthesia, and often place a temporary purse-string suture at the vent to hold it while the swelling settles. That suture is left loose enough to allow droppings to pass and is removed at a recheck.

Expect them to look for the cause: radiographs for impaction, eggs or masses, a faecal sample for parasites, bloods if the snake is systemically unwell, and a full husbandry review.

Expect a period of housing on paper towel rather than substrate, close monitoring of whether the snake passes droppings, and a delay before the next meal.

Recurrence is common when the underlying cause is not addressed, so the follow-up work on temperature, humidity, prey size and parasite control is not optional detail.

A relaxed snake with a smooth, even tail base and a flat vent scale. Knowing what normal looks like on your own animal is what makes an abnormality obvious.

Preventing the next one

Measure your temperatures rather than trusting a dial, at the warm end, the cool end and overnight. Most straining problems begin as a digestion problem, and most digestion problems begin as a temperature problem.

Feed appropriately sized prey at appropriate intervals, and wait for the snake to pass the previous meal before offering another.

Provide water deep enough to soak in and keep humidity within the species range so that both shedding and defecation stay easy.

Consider paper towel or another non-particulate substrate for any snake with a history of impaction, and for hatchlings and juveniles that feed on the substrate.

Have new arrivals faecal tested, and repeat it if droppings change.

Check the vent as part of routine handling: after every shed and after every defecation, look at the vent and the tail base. It takes seconds and it is how these problems are caught in the first hour rather than the second day.

For breeders, check males after every pairing. Hemipenal problems are found early by people who look and late by people who do not.

When to get help

Go immediately, out of hours if necessary, for any tissue protruding from the vent that has not returned within a couple of minutes, for any tissue that is dark red, purple, grey or black, for a tube of tissue with a visible opening, and for any female that is straining or has a swollen mid-body alongside it.

Go the same day for tissue that returned on its own but has done so more than once, for a snake straining without producing droppings, and for a hard plug or ring at the vent that you cannot identify.

Book a routine appointment after any prolapse has been treated, to confirm the cause was found and that droppings have returned to normal.

Bring the photographs, the timeline of when it appeared, the enclosure temperatures and humidity, the substrate type, the last feed and prey size, the last defecation, whether the snake has been bred or housed with another snake, and a fresh faecal sample if you have one.