First Walk is on Us!

✓ GPS tracked walks
✓ Activity reports
✓ On-demand walkers
Book FREE Walk

Jump to Section

What is Swelling in the Vaginal Area?

You may notice your dog has a vaginal discharge or that the vaginal area is swelling. It could be that your dog is entering the estrus (heat) cycle, whereby swelling is often seen. This phase lasts approximately for three weeks and you must be aware your dog can get pregnant during this phase and that male dogs will be attracted to her. Care should be taken during the estrus cycle in unspayed females as pregnancy is always a risk. The estrus cycle is just one of the  reasons why the vaginal area may be swelling.

  • Allergic reaction  
  • Estrus cycle 
  • Labor complications 
  • Forced separation during tie
  • Infection

Book First Walk Free!

Why Swelling in the Vaginal Area Occurs in Dogs

Allergic Reaction

Your dog may be allergic to the shampoo or other products you are using when grooming. It could also be that you dog has come into contact something that is causing an allergic reaction, such as a plant or bug. The vaginal area is a sensitive area and can react to insect or poison in plants. Because the cause is unknown, it is best to take your dog to your veterinarian clinic so they can diagnose the condition and prescribe treatment. 

Estrus Cycle

Your female dog will go into the heat or estrus phase for approximately three weeks once or twice a year. This is completely normal for your dog. The production of estrogen in this period causes the vaginal tissue to expand and face outwards from the vulva. Spaying of your dog will prevent this, it also means that your dog will no longer be able to breed.

Labor Complications 

If your dog is pregnant, then the process of preparing for labor will be signalled by changes in the vagina often construed as swelling. This is normal for the birth process. 

Forced Separation During Tie 

Pulling dogs apart during mating can injure the female – the male dog must ejaculate to break the bond or tie, which will then allow them to separate. 


Urinary tract infections are a common occurrence among female dogs.  Antibiotics or probiotics can help cure infection and prevent further swelling. Vaginitis is inflammation of the vagina and there are two types: juvenile (puppy) vaginitis, and adult onset vaginitis. Your veterinarian will prescribe the correct medication to clear the infection up. It is best to catch it in its initial stages, otherwise it may need surgical cleaning and draining to correct.

What to do if your Dog is Swelling in the Vaginal Area

If your dog is a female and she is going into the ‘heat’ phase, you must take extra care of her needs. Her behavior may change and she may become a bit moody or snappy as her body is flooded with hormones. Be aware that male dogs will be attracted to her now, so it may be better to keep her at home. During this stage, she can and will get pregnant if a male dog can get to her, so you must be extra protective if you don’t want a litter of cute puppies arriving in your home. If you are wanting to breed her, now is the time to consider it. 

If the swelling is an allergic reaction, it can be hard to find the cause. It is advisable to take your dog to the veterinarian so they can help to soothe the itching or inflammation with medication. Usually, with medication the swelling will go down quickly and your dog will be fine. 

During labor preparation for your pregnant dog, you will notice changes to the vaginal area. This is quite normal and is best left to nature to perform its miracle. But if your dog becomes uneasy, is in pain, or is struggling with the birth then get immediate veterinary assistance to help her through it without injury. 

Forcing dogs apart due to poor planning when your dog is in heat is never a good idea. If you don’t want your dog to get pregnant then keep her away from male dogs and safely locked up at home. Forcing dogs apart during the mating process can cause the female a lot of pain and injury. As the male inserts his penis, the bulbous head expands, literally ‘holding’ him to the female. Wrenching them apart can cause ripping and tearing of the vaginal area, internal injury, and blood loss. The male dog must ejaculate and only then does the bulbous head return to normal to allow him to withdraw easily. 

Bacterial and yeast infections can become a major concern if they are not treated immediately. A quick trip to the veterinarian will save you a lot of concern and for your dog, a lot of irritation. A course of medication will be prescribed, and possibly medicated creams. The infections are easier to treat during the initial stages; don’t wait to see if it gets better, it will only get worse.

Prevention of Swelling in the Vaginal Area

If your dog is in heat, there is nothing you can do to prevent it other than having your dog spayed. Once your dog is spayed they will never have the heat cycle again but bear in mind they will be unable to breed and produce puppies. For other conditions, it comes down to observation of your dog and acting fast when you know something is not right. Allergies can come from all sorts of things - from food to chemicals, to plants and bugs. A good maintenance procedure is to check your dog regularly for cuts, infections, or lumps and swellings. Doing this during grooming is a quick and effortless way to care for your pet.

Cost of Swelling in the Vaginal Area

The costs of treatments can vary every between veterinarians within a town, let alone across the country. But to provide a baseline, here are some cost averages. Spaying a female dog is more complicated than neutering a male dog, so you can expect to pay on average $300 or more. External allergy treatments are $150 for simple cases and the price can climb for more advanced conditions. Treatment for infections can cost $950 while treatment for delivery problems in a female dog can cost on average $1800. Damage caused by separating mating dogs can have an expense of $1000 to repair rips and tears to the vaginal area.

Swelling in the Vaginal Area Questions and Advice from Veterinary Professionals

Staffordshire Bull Terrier
9 Years
Mild condition
0 found helpful
Mild condition

Some kind of skin infection started in the area of where.her nipples where removed 1 year ago.
Spread down into her vulva an aand legs .now one of her legs are swollen up. Just put her on cephilexin today . any thought? It seems to be out side omly effection the skin . its slight red and doesnt seem to be any internal infection for now . it looks like her vulva is in heat and the skin around it is firm and swollen .

Add a comment to Lay's experience

Was this experience helpful?

Mixed Chihuahua
5 Years
Fair condition
0 found helpful
Fair condition

Has Symptoms

Swollen private part

My dog stared to not want to eat what he normally eats, so I woundered something was wrong with him. Then later on I realized that his private part was swollen, why is it swollen I ask?

Dr. Callum Turner, DVM
Dr. Callum Turner, DVM
3318 Recommendations
There are various causes for swollen ‘private parts’ which may include infections, trauma, inflammation among other causes; if Fluffy also has a loss of appetite it may be more serious than a localised condition. You should visit your Veterinarian to determine the cause so that the most appropriate treatment is given. Regards Dr Callum Turner DVM

Add a comment to Fluffy's experience

Was this experience helpful?

Lab daushund pit mix
9 Months
Moderate condition
2 found helpful
Moderate condition

Has Symptoms

Vulva swollen, stench

My dog is 9 months was spayed at 6 months and just today I’ve noticed her vulva swell up and a stench coming from the area. No
discharge, doesn’t seem to bother her

Dr. Callum Turner, DVM
Dr. Callum Turner, DVM
3318 Recommendations
If the vulva is swollen, there are a few possible causes which may include hormonal conditions, ovarian remnant syndrome among other causes; I would certainly recommend popping into your Veterinarian especially if there is a foul smell coming from the vulva. Regards Dr Callum Turner DVM

Add a comment to Kami's experience

Was this experience helpful?

4 Years
Mild condition
0 found helpful
Mild condition

Has Symptoms

Straining To Urinate

My girl dog has swelling in the area between her vagina and anus. We have taken her to the vets twice to have her urine checked. The first Time they said she had a lot of crystals in her urine but not the kind that cause a UTI. So we were told to wait a week and increase her water intake. We brought her back two weeks later with another urine sample like they asked and they came back saying they think it’s a yeast infection. My poor girls been through two weeks of that medication and it seemed to help a bit but today I noticed it’s swollen again. They only other thing I can add is she has a clear discharge that has almost a “tire”?? Smell? I know it’s weird. That’s the only thing that comes to my mind when I smell it. I hope you can give me some advice. Also she was on antibiotics at the beginning when we thought it was a UTI

Dr. Callum Turner, DVM
Dr. Callum Turner, DVM
3318 Recommendations
Smells are sometimes an indicator of certain conditions or infections, however tyre smell isn’t one I’ve come across; smells do indicate infection (fungal mainly) and if there hasn’t been any progress with treatment a sample should be taken for identification so that the most appropriate treatment may be given. Regards Dr Callum Turner DVM

Add a comment to Zoey's experience

Was this experience helpful?

Border Collie
11 Months
Moderate condition
1 found helpful
Moderate condition

Has Symptoms

Bloody discharge
swollen vagina

My 11 month old border collie went into heat about a week ago and nothing changed other than the discharge and a small amount of swelling. Now her vagina has doubled in size, she isn't eating, and she is constantly bothered my her genitals. She snaps as if something is biting her backside and has to be near me more than usual. She is also panting heavily at all times and has stress breath. I've never gone through this with another dog, so I'm not sure if this behavior is normal or not.

Add a comment to Dixid's experience

Was this experience helpful?