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If your dog's penis is out and won't slide back into the sheath, that's paraphimosis, and it needs dealing with today rather than tomorrow. The exposed tissue swells fast, and the more it swells the harder it gets to put back.1 Most of these cases go well when we see them early. The ones that go badly are almost always the ones that waited.
Key Takeaways
Come in today if: your dog's penis is exposed and won't retract, and especially if it looks swollen, dark or dry, or he's straining to urinate and producing nothing. A dog who can't empty his bladder is a go-now emergency. Call (519) 896-0532 or book online. Outside our hours, go to the nearest emergency hospital.
Paraphimosis is the inability to completely draw the penis back into the preputial cavity.1 The penis comes out normally, then the skin at the opening of the sheath rolls inward behind it and traps it there.
That trapped position is the whole problem. The rolled preputial opening acts like a tight elastic band around the base, and it blocks the veins draining the penis while the arteries keep pumping blood in. Fluid builds up, the tissue swells, and the swelling makes the band effectively tighter. Left alone, that loop keeps tightening itself.
Phimosis is the mirror image: an abnormally small preputial opening, so the penis can't extrude at all.5 It usually goes unnoticed until a dog is bred, and it's a much less urgent problem. If you've been reading around and seen the two words used interchangeably, they aren't the same thing.
A small amount of pink tissue showing after excitement, which slides back on its own within a few minutes, is normal and isn't paraphimosis. Paraphimosis is when it stays out.
Yes. I'd treat any dog whose penis won't retract as needing attention the same day, and as needing it immediately if he can't urinate.
The reason is how fast the tissue changes. The exposed penis rapidly becomes swollen, and with continued exposure the mucosa dries out and becomes painful.1 Once the surface dries out you get cracking and ulceration, and once the swelling is severe enough the blood supply suffers. The goal of treatment is to get the penis back inside before the tissue is compromised.2
The second reason is urinary. If the swelling closes off the urethra, your dog can't empty his bladder, and a bladder that can't empty is its own emergency regardless of what caused it. Straining to urinate with little or nothing coming out is the sign to stop reading and get in the car. Straining to urinate has several causes, and all of them need an exam.
I've never regretted seeing one of these too early. I have regretted the ones that arrived on day three.
In dogs, paraphimosis most commonly happens after manual semen collection, and less commonly after mating.1 That's the single most useful thing to know about the causes.
Beyond those two, the recognised causes are:
| Cause | What's actually happening |
|---|---|
| Semen collection or mating1 | The bulbus glandis swells during erection. If the prepuce slips behind it, the penis is trapped once the swelling is up. |
| A small or narrowed preputial opening1,2 | Either congenital or scarred down after previous injury. The opening is too tight to let the penis back through. |
| Hair caught around the penis1 | A ring of preputial hair acts as a constricting band. Easy to miss and easy to fix, which is why it's the first thing we look for. |
| Trauma1,2 | Direct injury, including fracture of the os penis, the bone inside the canine penis. |
| A mass on the penis1 | A tumour physically prevents retraction. |
| Priapism1 | A persistent erection that doesn't resolve, so the penis stays out long enough to become trapped. |
| Foreign material1 | Anything lodged in the sheath, from grass awns to debris. |
| Balanoposthitis | Inflammation of the penis and sheath. It can be the trigger, and it's also a consequence once the tissue has been exposed. |
| No identifiable cause | Idiopathic paraphimosis is common enough to have its own surgical literature, and the two recent case series on repair were both in dogs with no cause found.3,4 |
Weak preputial muscles and a shortened or underdeveloped prepuce sit behind several of these. In a dog who has had it once, the anatomy that let it happen is usually still there, which is why recurrence is the thing we plan around.
The first sign is usually the obvious one: the penis is out, and it stays out. Owners often notice the licking before they notice anything else.
Here's how I'd sort what you're looking at:
| What you're seeing | What it suggests | What to do |
|---|---|---|
| Briefly out after excitement, slides back within minutes | Normal | Nothing. Keep an eye on it. |
| Out and not retracting, pink, not swollen, urinating fine | Early paraphimosis | Start the steps below and call us today. |
| Out, swollen, dry or cracked, licking constantly | Established paraphimosis | Come in now. Cool and lubricate on the way. |
| Dark red, purple or grey tissue | Blood supply compromised | Emergency. Go straight in. |
| Straining, little or no urine produced | Possible urethral obstruction | Emergency. Go straight in. |
| Recurring episodes over weeks or months | Chronic or idiopathic paraphimosis | Book. This one needs a surgical plan, not a repeat fix. |
Read this first. These steps are what to do while you're arranging to be seen, not instead of being seen. If the tissue is dark, if your dog won't let you near it, or if he's straining to urinate, skip all of it and come in. Call (519) 896-0532.
The techniques below are the same ones we start with at the hospital. Cold compression, massage with a topical hyperosmotic solution and anti-inflammatory treatment are the standard approach to getting the penis back in before the tissue is compromised.2
We start conservatively and escalate only if we need to. In most dogs the penis goes back without surgery.
The first move is to look for a constricting band, usually hair, and remove it. Then the area gets cleaned with warm saline and lubricated generously. Treatment begins with gentle cleansing and liberal lubrication, then the penis is repositioned by sliding the prepuce back toward the body and extruding the penis a little further before letting it return.1 That counterintuitive step, pushing it out slightly before it can go in, is what unrolls the trapped preputial opening.
If the swelling is fighting us, a cool compress with gentle digital pressure works as a pressure bandage, and a topical hyperosmotic solution pulls fluid out of the tissue.1,2
Sedation does a lot of the work. Acepromazine at 0.005 to 0.03 mg/kg by intramuscular, subcutaneous or slow intravenous route is useful here because it sedates and causes mild hypotension, which makes the tissue easier to manipulate.1 A relaxed dog with slightly lower blood pressure is a much easier reduction than a tense one.
Once it's back in, antibiotic and corticosteroid ointment goes into the preputial cavity to settle the inflammation and cover any secondary infection. Sometimes we place a temporary purse-string suture to hold things in position while the swelling comes down. If the urethra has been damaged, a temporary closed-system indwelling urinary catheter may be needed to prevent a stricture forming later.1
Your dog goes home in a cone, and that part isn't optional.
Most single episodes don't. Surgery is for the dogs who keep relapsing, and for the ones where the anatomy makes another episode inevitable.1
Chronic cases usually need the preputial opening revised or the prepuce advanced.1 Two recent case series looked specifically at dogs with recurrent paraphimosis and no identifiable cause.
| Procedure | What it does | Reported outcome |
|---|---|---|
| Manual reduction, sedated | Cleans, cools, lubricates and repositions without cutting | Resolves most first episodes1 |
| Preputial orifice revision | Widens an opening that's too tight to let the penis back through | Standard for chronic cases1 |
| Phallopexy with preputial advancement | Anchors the penis and moves the prepuce forward to cover more of it | 16 dogs: half had no recurrence at all, another 6 improved on their pre-surgical state, 2 saw no real change. Median surgery time 60 minutes.3 |
| Modified preputial elevation and cranial translation | Moves the prepuce forward by releasing skin behind the bulbus glandis | 6 dogs, median 24 month follow-up: all had an excellent outcome. Four minor complications across 3 dogs, all resolved without treatment.4 |
| Partial penile amputation | Removes damaged tissue when the penis can't be salvaged | Last resort, for tissue that's already dead or chronically inflamed |
In the phallopexy series the dogs had been dealing with this long enough to be referred for surgery, and the technique still stopped it outright in half of them.3 In the smaller preputial translation series the dogs had a median nine and a half months of paraphimosis behind them before surgery, and all six did well at two years.4 Keep both sets of numbers in mind if someone tells you amputation is the answer, because in our experience that's rare.
If your dog does need a procedure, our surgical team will walk you through which one fits his anatomy.
After a straightforward reduction, most dogs are comfortable within a day or two. The swelling settles, the mucosa rehydrates, and things go back to normal.
What we ask of you at home is short: keep the cone on until we say otherwise, give the anti-inflammatory and any ointment as dispensed, keep him quiet and away from other dogs, and check the sheath a couple of times a day. If the penis comes out again and won't go back, we want to know that day rather than at the recheck.
Recurrence is a real risk. A dog who has had one episode still has whatever anatomy allowed it in the first place, and for some dogs that means it happens again. Keeping the hair around the sheath trimmed short removes one of the easier triggers. If your dog isn't neutered and the episodes follow mating or excitement, neutering is worth discussing, though it isn't a guaranteed fix on its own.
The pattern to watch for is repeat episodes over weeks or months. That's the point where we stop treating each one as a separate event and start talking about a surgical plan, because the case series above are all in dogs whose owners had been through this several times already.3,4
If you're looking at this right now and trying to decide whether it can wait until morning, it can't. Call us.
Yes. Treat any dog whose penis is exposed and won't retract as needing to be seen the same day, and as needing immediate care if he is straining to urinate and producing little or nothing. The reason is how fast the tissue changes. The exposed penis rapidly becomes swollen, and with continued exposure the surface dries out and becomes painful. The swelling also feeds on itself, because the rolled preputial opening blocks the veins draining the penis while the arteries keep filling it, so the longer it stays out the harder it is to put back. The goal of treatment is to get the penis back inside before the tissue is damaged. A dog who cannot empty his bladder is a go-now emergency regardless of the cause.
You can start the same steps we use at the hospital while you arrange to be seen, but they are not a substitute for being seen. Gently clean the exposed tissue with mild soap and water, and check for hair or debris wrapped around the base. Wrap ice or frozen peas in a cloth and hold it against the swelling for about five minutes, never putting ice directly on the tissue. Apply a paste of plain white sugar and water, leave it a few minutes and rinse it off, because sugar is hyperosmotic and pulls fluid out of the swollen tissue. Then apply a water-based lubricant such as K-Y Jelly. Put a cone on your dog, because licking keeps the tissue swollen and traumatised. If nothing improves within about 30 minutes, or it worsens at any point, seek veterinary care immediately. Do not force the penis back against resistance, because that tears tissue and makes any repair harder.
They are opposite problems and they are managed differently. Paraphimosis is the inability to draw the penis back into the sheath once it is out. The skin at the preputial opening rolls inward behind the penis and traps it there, and it is urgent because the trapped tissue swells and dries out. Phimosis is an abnormally small preputial opening, so the penis cannot extrude at all. Phimosis often goes unnoticed until a dog is bred, and it is far less urgent, though it can cause urine to pool in the sheath and lead to inflammation. The two words get used interchangeably online, but only one of them needs same-day attention.
Most single episodes do not need surgery. In the majority of dogs the penis goes back with a constricting band of hair removed, warm saline cleaning, generous lubrication, cold compression and sedation. Acepromazine is useful here because it sedates and causes mild hypotension, which makes the tissue easier to manipulate. Surgery is for the dogs who keep relapsing, or whose anatomy makes another episode inevitable, and it usually means revising the preputial opening or advancing the prepuce. In a series of 16 dogs with paraphimosis of unknown cause, phallopexy combined with preputial advancement stopped recurrence completely in half of them, with median surgical time of 60 minutes. A smaller series of six dogs treated with modified preputial elevation and cranial translation reported excellent outcomes in all six at a median follow-up of two years. Penile amputation is a last resort for tissue that cannot be saved, not an early option.
It can, and it's a real risk to plan around. A dog who has had one episode still has whatever anatomy allowed it in the first place, whether that is a narrow preputial opening, a short prepuce or weak preputial muscles. Keeping the hair around the sheath trimmed short removes one of the easier triggers, since a ring of preputial hair can act as a constricting band. If your dog is not neutered and episodes follow mating or excitement, neutering is worth discussing, though on its own it is not a guaranteed fix. Repeat episodes over weeks or months are the point where we stop treating each one as a separate event and start talking about a surgical plan. The dogs in both published surgical case series had been through this several times before referral, with a median of nine and a half months of paraphimosis in one of them.
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