Can Dogs Get Erect After Being Neutered

In another ‘episode’ of Ask the Jug Dog, we have an anatomical question related specifically to male dogs…

“I have a 3-year-old Labrador who has had the snip (neutered) for around 2 years now but recently he’s started getting erections at random times. I thought neutered dogs couldn’t get it up anymore? Should I be worried?”.

Joseph Holden, 34, Newcastle

This is a common question we get at the Jug Dog. There are many assumptions out there about what neutering/castration/the snip actually does and what it doesn’t. Many people have their dog neutered to calm them down or to make sure they don’t give you any unexpected visitors at your door angry their dog’s pregnant. An erection is something they can still get and in this blog post, we’re going to explore what causes them and what to do about them if they are happening frequently or for a long period of time.

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Can neutered dogs get erections?

Let’s dispell the myth right here – neutered dogs can and probably will get erections. When a dog is neutered their testosterone factory is inhibited and their puppy making semen is no longer in production but that doesn’t stop your dog from getting excited and therefore having an erection from it.

They will have a lot fewer erections, stop humping everything in sight and won’t feel the need to mark their territory as much after neutering but it won’t stop completely. If your dog gets excited, for whatever reason, the body can react by sending blood to the penis along with baculum (penis bone) to produce an erection which looks a little bit like lipstick sticking out.

Neutering doesn’t remove the baculum and does not stop the blood flow to the penis and that is why neutered dogs can and will get erections.

What to do if your neutered dog has an erection

Here’s some advice for you if your dog does get an erection.

Figure out the cause

If your dog gets an erection and/or tries to hump things try and make a note of the situation which caused it. Did it happen just as you can come in from work? Does it happen when you tell them it’s time for walkies? Whatever it is that seems to cause it to try and downplay the next time it happens and you’ll find that these erections will start to become a thing of the past.

Ignore it

The most widely used response to a neutered dog’s boner is to simply ignore it. By ignoring the dog when their that excited you can help them calm down so that it goes away naturally.

Make sure they are well exercised

A healthy dog is a dog who is well exercised and isn’t frustrated. Make sure to keep your dog active so that their frustrations don’t build up. We’ve all heard of humans suffering from sexual frustration and dogs can get it as well which can be abated with a nice walk.

Cold water

There’s no better way to get rid of a castrated dog’s erection than a blast of cold water. This could be particularly effective for those with dogs with erections which don’t seem to away and your dog is looking stressed or uncomfortable because of it.

What causes a neutered dog to get a hard on

There are several reasons why a dog could get an erection, we’ll list them here to help you diagnose the cause of your dog’s lipstick..

Sexual excitement

The first and most obvious cause of a dog’s erection is sexual excitement. Of course, a neutered dog has a much-reduced interest in sexual intercourse following neutering but that’s not to say they don’t get excited from time to time and show their excitement with humping, mounting followed by an erection. A bitch doesn’t need to be involved as dogs can start to hump because they’re bored.

This is completely normal behavior albeit rarer for a neutered dog.


Dogs can get erections from just being happy and excited. Do you notice the lipstick coming out when you get home from work or when you suggest going for walkies? That could be the root cause.


In some rare cases, sudden anxiety and stress could cause some dogs to have an erection and not an enjoyable one even if they’ve been neutered. Anxiety and stress-related erections can manifest itself in an erection that comes quickly and seems to take a while to go away (see our notes on how to get rid of it).

Has the dog recently gone through any trauma? Has anything major changed in the house such as the arrival of a new baby? These sorts of big changes can make a dog feel uneasy which can result in unexpected erections.

As time goes by the anxiety should ease off as will the hard-ons.


Paraphimosis is a medical term for an erection that won’t go away which is a genuine concern for the dog and you, the owner. A neutered dog can also suffer from this condition This condition means that the penis cannot be retracted under the sheath which can lead to great discomfort, pain and further complications if medical assistance isn’t sought. The main concern is dryness and irritation occurring on the penis from being overexposed.

If your dog’s erection has been present for an abnormal length of time and they look to be in discomfort then medical attention should be sought immediately. If that’s not possible then ensure the penis stays moist with lubrication.

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9 thoughts on “Can Dogs Get Erect After Being Neutered”

  1. Hi, my dog had the snip about 4 weeks ago and since then he has had 2 hazelnut sized balls of tissue in place of his testicles, we went back to the vets and they said though its common it does happen or that it may be a suture infection, so after another week off we go again as they had gotten smaller by a tiny bit, they said “were sure things will be ok it just takes time” so now we are here and they are getting smaller but very slowly, I have now noticed that down the center of his penis about the thickness of a pencil is rock hard, its not an erection as nothing is coming out of the foreskin if that’s the right word, I’m really worried and need some advice to go back to the vets with or I might just get a “it will be ok Richard just give it time” but this and the “suture infection” can not be comfortable for my dog……HELP PLZ.

  2. The Jug Dog

    Hi Richard,

    A dog’s penis isn’t like ours, it’s a bone. These things really do take time and as long as the foreskin isn’t sticking out then it should be fine. If you’re dog is behaving like normal then I’d relax.

  3. Dan Johnson

    My 5 y/o Chiquahua was neutered at 5 mos. But for over 2-3 years, he attacks a stuffed did you bigger than him, humping it ferociously and gets a solid erection, then has to wait for it to subside. He looks very uncomfortable then. He does this 2-4 times a week.
    Is this really normal? A few times I had to squirt it with cold water to help him retract. Just wondered if I should be concerned? Thank you. DJ

  4. angela carter

    my 3 year old Lhasa apso was neutered about 18 months ago but has for the last 3 or 4 days been constantly licking himself it looks really red and hes growling if you go near to look at it ?

  5. Gill Stevenson

    My 3 year old flat coat x golden retriever has started having erections, but they clearly are causing him stress and discomfort. His back arches and his tail is between his legs. He find it difficult to walk and sometimes stands there and does an involuntary humping/spasm?
    Should I be taking him to the vet, or is there a simple explain?
    He also had an upset stomach during the night (which never happens).
    Thanks very much. Looking forward to any help and advice.

  6. Max Drayton

    Guys! The cold water trick works. I gotta say, I was surprised. I was at the outdoor cinema watching frozen and fooling around with my girl. She wanted more popcorn from the kiosk but i couldn’t well be walking through the cars sporting a hard on. Even if it wasn’t a kids movie. I dipped the tip into a slushy and my erection was cured, And I mean QUICK, the thing practically inverted. I was worried I would have to fish it back out with chop sticks!
    But nah for real. Stop making a big deal about your dogs Bonno’s and definitely stop spraying the poor fellas with cold water. I’m no dog dong doctor, but it just sounds like a bizarre experience for the lil guys

  7. Hi. My dog was neutered 10 years ago and today from nowhere he was sleeping and woke up with an erection and after that he was in the pose for like 5 minutes and came out 2 drops o clear liquid. He wasn’t doing anything.. just sleeping… is that normal? I think I will take him to the vet ASAP! I would like any advise . Thank you !

  8. Comment to Gail Stevenson:
    What you described, besides the erection part, sounds very similar to bloat. Bloat is extremely painful, serious and potentially fatal if not taken to a vet as soon as symptoms show. It sounds like your dog recovers from the episodes, and hopefully unrelated, but do some research and get familiar with canine bloat, so you can help your lil guy jic. I also have a flatcoat retriever, I’ve learned a lot about since they can bloat. There’s a ‘canine bloat awareness’ facebook group that’s a great source of info and help if you are interested. Best to you and your dog.

  9. I have like questions as Luis, but didn’t see all the answers. My dog was just nurtured
    ( 8 days ago) and he has the same type of issue. Also when he get excited over visitor, like my grandchildren, his penis is exposed. What should I do ?

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