Why is there a round thing on my dog's private part every morning?

If what you're seeing looks like a symmetrical swelling near the base of his penis in front of the scrotum, what you see is likely the *bulbus glandis*. This structure is a normal part of the male dog's anatomy. The *bulbus glandis* swells during [mating](https://www.petcoach.co/article/anatomy-and-function-of-the-reproductive-system-in-dogs) which causes the dogs to tie or 'lock' together during the act. It may swell when the dog is excited, even in a neutered dog.

Male dogs have a structure called the *bulbus glandis* along the shaft of the penis. The gland swells when they get excited or sometimes when they have to urinate. These glands are responsible for the "tie" that occurs during breeding. Even though your dog is neutered, he can still get erections, so likely something excited him causing the glands to swell. It is a perfectly [normal part of his anatomy](https://www.petcoach.co/article/anatomy-and-function-of-the-reproductive-system-in-dogs) and no cause for concern.

If the lumps are at the base of his penis, it could be his "bulbus glandis". Also known as the "knot", these glands become pronounced during mating or excitement and are quite normal. If the lumps are not at the base, have Max examined by your vet to determine cause.

What you may be seeing is the *bulbus glandis*. It is a normal part of the [male dog anatomy](https://www.petcoach.co/article/anatomy-and-function-of-the-reproductive-system-in-dogs). The *bulbus glandis* 'ties' a male and female dog together during mating. It doesn't mean his testicles have grown back, only that he is excited. It may also occur with an erection when a dog is overstimulated or happy. The swelling will go down as the dog calms.

What you may be seeing is his bulbus glandis. They are two glands located at the base of the penis on both sides. They function during mating to effect the tie while mounting a female. This is normal and likely no cause for concern. The pigmentation of his scrotum may also be normal. You can have him seen by your veterinarian to discuss any concerns regarding either.

Thank you for contacting Pet Coach with your question about Cypress. I'm wondering if this bulge was toward the back of his penile shaft. If it was, then what you likely saw was his bulbourethral glands. These are normal structures of the penis, and they become enlarged when the dog is aroused. Even neutered dogs can become aroused. Given that this bulge is now gone and he's totally normal, that would be my suspicion. There's nothing to worry about here! I hope this helps!

I'm wondering if what you are describing are your dog's bulbourethral glands. These are glands on either side of the penis that can swell, and in a dog the size of Ollie they would appear about walnut-sized. This can happen even if a dog is neutered. If this is what you're seeing, the enlargement will fluctuate in size and at times will nearly disappear. If what you're seeing is more growth-like (and particularly if it's asymmetrical, rapidly growing, etc) then I would be more concerned about it being a possible mass, and would advise having it looked at by a vet. Hope that helps!