Get

In Your Inbox

Dogster is reader-supported. When you buy via links on our site, we may earn an affiliate commission at no cost to you. Learn more.

Why Do Dogs Get Eye Boogers & Tear Stains? 6 Vet-Verified Causes & Tips

close up poodle with eye allergies

If you have had a dog for a while, you probably noticed that they sometimes get eye boogers and tear stains, and it’s common to worry that it might be a sign of poor health. Fortunately, eye boogers and tear strains are natural occurrences for most dogs, but keep reading while we list the reasons that they can have these issues and provide tips and tricks to minimize them.

divider dog paws 3 oct 2024

Why Do Dogs’ Eyes Tear Up?

Your dog’s eyes are not that different from ours, and they tear up for the same reason: to clean and lubricate the eyes. Usually, the discharge is clear or slightly gray and won’t irritate the eyes or the area around them. If you notice reddish brown staining around the eyes, it’s from porphyrins, naturally occurring iron-containing molecules in the tears and saliva.

Closeup of Poodle dog with white fur and red tear stains
Image Credit: Susan Schmitz, Shutterstock

Why Can There Be Tear Staining Around a Dog’s Eyes?

The porphyrins in a dog’s tears contain iron molecules, which produce a rust color. The natural shape of canine eyelids enables some of the tears to drip onto the fur around the eyes, which leads to staining. Since porphyrins are also in saliva, there is a good chance that you will notice staining around the mouth too. It’s easier to see on light-colored dogs, but the staining can occur in any breed.

divider dog paws 3 oct 2024

Why Are There Boogers in a Dog’s Eyes?

Boogers in your dog’s eyes are quite natural, and like humans, they develop as the tears collect dust and other pollutants from the air. They then dry as your dog sleeps, forming the boogers. Playing outside on windy days can additionally cause the eyes to dry out, causing the formation of more eye boogers than usual. However, it can also be a sign of a health issue.

1. Allergies

One of the most common reasons dogs can develop eye boogers is that they have an allergy to something in the environment. Like humans, canines can be allergic to pollen from trees, grass, and flowers, which can cause the eyes to develop boogers. Allergies may also cause skin irritation in dogs. Contact your vet if you think that your pet might be suffering from allergies to help get them treatment.

close up shih tzu dog with eye discharge
Image Credit: Anne Kitzman, Shutterstock

2. Eye Irritant

If your dog gets soil, sand, or another pollutant in their eye, there is a good chance that your dog’s immune system will kick in, which will cause boogers to form. In most cases, tearing will help remove the irritant, but you may need to contact the vet if it continues for more than a short time.


3. Dry Eyes

If your dog isn’t producing enough tears, they may have thick discharge from the eyes. If you think that this is the situation for your pet, contact your vet. In many cases, medication or false tears can help.


4. Conjunctivitis

Another condition that dogs can get just like humans is conjunctivitis, or pink eye, which causes the mucous membranes around the eye to become irritated and produce a discharge, which can result in a high volume of eye boogers.

dog pink third eyelid, conjunctivitis
Image Credit: WANALEELAND, Shutterstock

5. Breed-Specific Issues

Some dogs are naturally more prone to eye issues due to the shape of their heads. Breeds with prominent eyes, e.g., Pugs, are prone to eye issues because their eyelids cannot completely close with each blink.


6. Other Health Issues

Certain health issues like glaucoma, eyelid growths, and eye ulcers can lead to increased tearing and the production of eye boogers.

divider dog paws 3 oct 2024

When Should I Contact a Veterinarian?

If you feel that your dog’s tears or boogers are not normal, it’s a good idea to contact the vet to have your pet looked over. You should also contact them if you notice any redness, swelling, or pain or if the amount of discharge has suddenly increased. Take your dog to the vet immediately if they start to aggressively paw at their face.

If you need to speak with a vet but can't get to one, head over to PangoVet. It's an online service where you can talk to a vet online and get the personalized advice you need for your pet — all at an affordable price!

PangoVet_Mention-in-Content Savings V1

Tips to Reduce Tear Staining

  • Gently wipe the area around your dog’s eyes and mouth with a warm, damp cloth daily.
  • Commercial wipes for your pet’s eyes can be expensive but quite effective at reducing the amount of staining that occurs.
  • Allow your dog to drink filtered water instead of tap water, as the minerals can sometimes increase the amount of staining.
  • Regular grooming and trimming the hair around the eyes can help reduce the amount of visible staining.
  • Keep the area around the eyes as dry as possible.
  • Contact the vet if you think that the tearing is excessive or if it is accompanied by other signs, such as redness, to rule out underlying health problems.
owner cleaning eyes of the dog using wipes
Image Credit: Marina.Martinez, Shutterstock

divider dog paws 3 oct 2024

Conclusion

If your dog has tear stains around their eyes, there is no cause for alarm, as it is usually the result of tiny iron-containing molecules that occur naturally in tears getting onto the fur. Boogers are generally the result of dried tears that contain dust and other pollutants and are natural occurrences in dogs like they are in humans.

However, certain health issues can result in excessive tearing or the production of boogers, including allergies and doggie pink eye, so contact the vet if you think that there are underlying health problems, especially if you notice other signs, like redness or swelling.


Featured Image Credit: oasisamuel, Shutterstock

Want content like this delivered to you?

Sign Up For Our Newsletter

News, insights, expert advice, and everything dog

* By submitting, you agree to our Terms & Conditions and Privacy & Cookies Policy.

How useful was this post?

Click on a star to rate (you can leave written feedback after clicking submit)

Help us improve Dogster for pet parents!

Your feedback really matters.

What did you like about this post? Also how can we improve it?

Join the conversation

Leave a Reply

You’re very welcome to leave a comment or question. Please know that all comments must meet our community guidelines, and your email address will NOT be published. Let’s have a positive and constructive conversation.

Talk With A Vet Online

Peace of mind,
anywhere, anytime

Affordable vet advice

6 Common Chihuahua Health Problems: Our Vet Explains

Chihuahuas have long been known as being small, vivacious companion dogs. Many people like them because they are not large, they’re easy to...

20 Adorable & Inspiring Golden Retriever Quotes

It’s rare to have something inspire us as much as a dog can. Canines evoke so much love from human beings that it’s...

Schweenie (Dachshund & Shih Tzu Mix): Info, Pictures, Care & More

Although they’ve only been around for the past few decades, the Schweenie is a breed with a vibrant family history. As a mix...

80+ Instagram Captions for Dog Pictures to Please the Paw-Parazzi

There’s nothing worse than struggling to find the perfect paw-some caption for a beautiful picture of your dog, especially when posting it to...

More related

Are My Dog’s Nails Too Long? How to Tell & What to Do (Vet-Approved Tips)

Trimming your dog’s nails is probably not your favorite dog-related chore. Pups usually fidget, many actively dislike having their paws touched, and there’s...

13 Strange Looking Dog Breeds (With Info & Pictures)

There are several strange-looking dogs in the world, but since beauty is subjective, some owners consider them gorgeous rather than odd-looking. If you’re...

How Can I Talk With a Vet if I Am on a Trip With My Pet? Vet Approved Advice

Traveling with pets can be challenging because it comes with extra planning. Ensuring that you have quick access to a veterinarian can help...

Why Do Dogs Chase? Understanding Their Drive (Plus How to Control It)

Some dogs run full speed after a rabbit or car the moment they see them and leave you in a huge cloud of...

Keep reading

How to Add Grain to a Grain-Free Dog Food: 5 Vet Approved Tips

Over the last decade or so, grain-free and gluten-free diets have become increasingly popular for humans, and by extension, that popularity has trickled down into canine diets, too. However, as with the human population, provided the balance of nutrients is...

Weimaraner eating dog food

What Is Crude Fiber in Dog Food? Vet-Verified Nutrition Facts & FAQ

Finding good dog food can certainly be an uphill battle in many ways. Whether the problem is finding food that has the right nutritional components or if you have a picky dog who may not want to eat food, it...

Ginger dog eating

Wag Dog Food Review 2025: Recalls, Pros & Cons

Review Summary When you think of the company Amazon, you may not associate them with dog food. Wag is a fairly new dog food brand that is growing in popularity, and it is entirely owned and produced by Amazon. Wag...

Dogster_Wag Dog Food Review

Can Dogs Eat Beef Jerky? Vet-Approved Feeding & Health Facts 

Dogs are exceptional at persuading you to give them a bit of a treat. This interaction with your dog actually provides more than just a tasty snack for them; it also makes you feel good by increasing the bond between...

Can Dogs Eat Beef Jerky

Can Dogs Eat Vanilla Wafers? Vet-Reviewed Facts & FAQ

Vanilla wafers are not toxic to dogs, although they certainly aren’t the healthiest. Therefore, they aren’t a good option as a treat or snack. If your dog accidentally eats a vanilla wafer, there isn’t much to be concerned about, though....

Can Dogs Eat_vanilla wafers

Cesar Dog Food Review 2025: Pros, Cons, Recalls and Guide

Review Summary Cesar has been a staple in the pet food section of grocery and big box stores for decades. This food is especially popular with small dog owners because of its small package sizes and Westie mascot. They offer...

Dogster_Cesar Dog Food Review

Can Dogs Eat Capers? Vet-Reviewed Nutrition Facts & FAQ

You love your dog, so you want to give them treats every now and again, and sometimes those treats are your own food. A lot of the time, depending on the food, this is (mostly) fine for your pet. But...

Can Dogs Eat Capers

11 Best Dog Foods Made in the USA in 2025 – Reviews & Top Picks

With so many quality dog foods on the market today, dog owners rely on several criteria to help them decide between them. For some, the first question to answer is where the food is manufactured. With several high-profile incidents of...

brown dog sniffing a dog food