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 our online service where you can talk to a vet online and get the 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

What Dissolves Dog Poop in the Yard? 4 Great Options

Dog poop is an extremely unpleasant thing to have to clean up, but leaving it in your yard can lead to it getting...

Ask Dr. Paola- Spinning, Cushing’s Disease & Chewing (July 7, 2025)

Welcome to our “Ask Dr. Paola” series, where every Monday we bring expert advice straight from Dr. Paola Cuevas (MVZ) to help our...

15 Best Dog Affiliate Programs in 2026 – Reviews & Top Picks

According to the APPA, Americans spend over $100 billion on their pets per year.1 Given that dogs are the most common pets in...

Are Marigolds Poisonous to Dogs? Vet-Approved Health Facts

If you love gardening, filling up your flower beds with spring favorites is a must. But if you share your home with four-legged...

More related

Does Getting a Second Dog Help with Separation Anxiety? Vet-Verified facts & Considerations

Separation anxiety is one of the most common behavioral issues that plague pet owners and, unfortunately, a frequent reason dogs are surrendered to...

Do Cavalier King Charles Spaniels Like Water? Vet-Reviewed Facts & Swimming Tips

Some breeds are good at running, and others are good at swimming. Which kind of breed is the Cavalier King Charles Spaniel, and...

Top 5 Dog-Friendly Beaches in Tampa, FL: Off & On-Leash Places to Go in 2026

If you’ve ever been to Tampa, Florida, you know it is a gorgeous area with amazing restaurants, sandy beaches, and friendly people. Unfortunately,...

Why Do Dogs Thrive on Routine? 3 Vet-Verified Reasons

While all dogs have unique personalities, one thing they have in common is that they thrive on routine. Many experts agree that dogs...

Keep reading

How to Feed Dogs With Pancreatitis: 6 Tips & Tricks

Feeding a dog with pancreatitis (inflammation of the pancreas) can be difficult, especially when it comes to finding the right diet for them during recovery and long-term feeding. Both acute and chronic pancreatitis both require changes to your dog’s diet...

Golden Retriever dog eating

10 Best Bowls for Small Dogs in 2026 – Reviews & Top Picks

Finding the perfect bowl for a small dog will be different for every owner because, apart from their size, every small dog differs from the next. We can all agree that some of our needs overlap; the perfect bowl is...

French bulldog eating from a bowl

Darwin’s Natural Selections Dog Food Review 2026: An Expert’s Breakdown

If you’re a proud owner of a dog, you’ve likely heard about raw dog food diets and subscription services. While there are lots out there to check out, the big question is, are they all the same? That’s what we’re...

Darwin’s Natural Selections Dog Food

Can Dogs Eat Bean Sprouts? Vet-Verified Benefits & Precautions

Bean sprouts make a great, crunchy topper for sandwiches or ramen, but can you share this healthy vegetable with the pet giving you the puppy dog eyes as you chow down on your meal? Yes, bean sprouts are generally safe...

Can Dogs Eat Bean Sprouts

Can Dogs Eat Saffron Rice? Vet-Verified Facts & Safety Guide

Saffron rice is a tasty and savory dish, and dogs may be tempted to eat it. Many dogs enjoy the taste of rice and may see no problem with eating saffron rice. However, the issue with saffron rice is that...

Can Dogs Eat Saffron Rice

Gravy Train Dog Food Review 2026: Recalls, Pros & Cons

Review Summary The best way to a dog’s heart is through their stomach, and feeding them nutritional and tasty food is a surefire way to make you their favorite person. Finding a brand that you and your dog likes can...

Dogster_Gravy Train Dog Food Review

10 Best Dry Dog Foods in Australia in 2026 – Reviews & Top Picks

Since the dog food industry in Australia is not well-regulated, finding a safe and healthy diet for your pup can be a daunting task. Even if you know you want your dog to eat dry food rather than canned, your...

dalmatian dog eating dry food from a bowl

Can Dogs Eat Nutritional Yeast? Vet-Verified Nutrition Facts & Info

Nutritional yeast is all the rage among health-conscious eaters looking for delicious and nutritious ways to zest up their meals. With its generous mix of protein and essential nutrients, you’re right to wonder if you can offer this vegan-friendly ingredient...

Can-Dogs-Eat-Nutritional-Yeast