Why is My Hamster Bleeding From its Bottom?

There are plenty of benefits to keeping pets. From your health to your emotions, they keep you alive and going. But they require constant attention and care.

And when it’s a harmless little hamster, any harm to it could shake you to the core. With hamsters, a common worry is their bleeding.

So you might wonder, why is my hamster bleeding from its bottom?

The reasons for hamster bleeding from its bottom include Urinal Blood, bladder infection, kidney stones, or even bacterial or parasitic infection. If it is a female,  bleeding may be due to pregnancy. Cancer is also a known reason for hamsters to bleed from the bottom.

But it is not untreatable when causes are known. In our article, we’ll go through these in detail. So stay with us!

Hamsters Bleeding From Its Bottom: 7 Possible Reasons

Hamsters Bleeding From Its Bottom

The first thing to understand is that for a hamster to bleed is not uncommon. And it is a common hamster illness. But it surely seems scary and a worrying thing to face.

It’s strongly recommended to let your hamster be examined by a professional vet when it bleeds.

Let us head straight to the possible causes of hamster bleeding from the bottom.

Reason 1: Wet Tail

Simply put, a wet tail is diarrhea. But a watery and severe one that could turn out to be fatal if left untreated. So, it can result in morbidity and mortality. It is also known by the name Proliferative enteritis. So, hamster bleeding tail is seen.

Let’s have a quick look at some of its symptoms for sake of surety.

  • Wet backside.
  • Paleness, dehydration, and weakness
  • Weight loss.
  • Sunken eyes.
  • Protruding rectum.
  • Blood in the stool.

And not to mention some breeds of hamsters are more prone to getting them wet tail disease. They include teddy bears, Syrian, elderly, and dwarf hamsters.  

Reason 2: Infections

Hamsters are prone to infections in the urinary tract, kidney, or bladder. Especially hamsters are known for stones in the urinary tract. This causes the blood to flow in them from their bottom.

You have to ensure that if your hamster has any kind of infection inside them. For that check out the following symptoms in them.

  • Blood in the urine.
  • Urinating frequently.
  • When they put straining efforts into urinating.
  • When they lose their appetite. 
  • Thirsty for water all the time.

These are the most common symptoms of infection.

Reason 3: Uterus Infection-[Pyometra]

Female hamsters bleeding occurs due to an infection in their uterus. Uterine secretion causes pyometra leading to the growth of bacteria. This could happen right after when she has mated or during her pregnancy.

Check out the symptoms of pyometra below.

  • Blood of pus from the vulva
  • Foul odor
  • Bloody discharge 
  • Swollen stomach

These were the symptoms of open pyometra. And there is another type of pyometra called closed pyometra. In this type blood and pus would gradually gather inside. And may go undetected.

Reason 4: Digestive Issues

Stomach acne is one of the most common reasons for bottom bleeding. This kind of issue is referred to as gastrointestinal. Common symptoms are as follows.

  • The hamster seems sad and is lying in the corner all day long.
  • Unfriendly Behavior.
  • Non-Mobile.
  • Vomiting.
  • Eating Less.
  • Signs of Diarrhea.
  • Blood around its cage.

These are the most commonly seen symptoms.

Reason 5: Cancer and Tumor

Unfortunately getting cancer and tumors for these furry and cute little fellas is quite common. Though we strongly discourage them from assuming this right away whenever they bleed.

But this could be the possible reason. And diagnosis at the right time is a life savior. So, observe carefully the symptoms described below.

  • Loss of weight.
  • Loss of appetite.
  • Sores.
  • Abnormal swelling.
  • Seizures.
  • Collapse.
  • Discharge.

The most common form of tumor in hamsters is called uterine adenocarcinoma. And the only treatment is surgery.

Reason 6: Pregnancy

Do you know that hamsters become adults and mate within a few weeks? This pregnancy lasts up to 22 days. And you will notice their girth increases when she is pregnant.

Then near birth, they face restlessness and vaginal bleeding. 

Reason 7: Hamster’s Been Cut

Though seeing blood often takes your mind toward some serious health condition. But this is not always the case. I could just simply be scraped or cut.

So, you need to closely check the bleeding point to see if it’s a cut or wounded there. You might have dropped it accidentally.

Besides that, hamster sharing cage is not seen. So, they will fight and beat the hell out of each other. This results in bleeding of one or the other.

Sometimes even the faulty cage can also harm your fur buddy. But hey! Don’t worry about it. Here are some best cage suggestions specially made for hamsters.

  1. Hamster Cage | Awesome Arcade Hamster Home

I hope, you find these suggestions helpful.

What to Do When a Hamster Bleeds From Bottom?

Honestly, there is not much for you to do besides carefully observing symptoms first of all. So, if you think your hamster requires proper medical treatment, rush to the vet and let him do his thing.

And believe me, that’s the best you can do for your lovely little fella. So you should do it asap before it’s too late. 


How do you know if your hamster has internal bleeding?

There are multiple signs to ensure that your hamster is bleeding internally. Namely, these signs are paleness, fast heart rate, collapse, coughing up blood, or shallow breathing. Inability to walk, eye direction changes, or behavioral changes are also signs of bleeding inside the brain.

How to know if a hamster is hibernating or dead?

If the temperature is cold, your hamster is probably hibernating. Make the temperature warm a little bit, and see if it wakes up. Furthermore, check for its breath which would be 1 every two minutes during hibernation. Checking the heartbeat is also a way to check if it’s hibernating or not.

What would cause a hamster to suddenly drag its rear legs?

Weakness is the common cause for a hamster to drag its rear legs. And various diseases like pneumonia, renal, kidney disease, cancer, or even heart disease could be the reason. And not to mention spine trauma, muscle or lower parts bones are also the major causes. 


By now you should be clear about why my hamster is bleeding from its bottom. The reasons could be multiple as we have explained above.

So before panicking, examine carefully and then head straight to the vet to save your pet.

Good Luck!

Ryan Dugan
Ryan Dugan
Ryan Dugan

Ryan Dugan is a dedicated pet care professional who offers top-notch services for a variety of pet species. He has a soft spot for my own feline companion, Sophie. He is passionate about animals He shares his knowledge and experience on his blog to help other pet owners understand and care for their own beloved companions. Whether you need a pet-sitting service or advice on pet care, He is the go-to expert.

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