Back to blog

How To Tell If Your Dog Has Seasonal Allergies

Is your dog sneezing, gnawing on his/her paws, or agitated? Do you notice watery eyes or red ears? It might have seasonal allergies.

October 5, 2025 Pollen Sense View production source
How To Tell If Your Dog Has Seasonal Allergies

Gesundheit, Pooch!

Dog outdoors with seasonal allergy symptoms.

Is your dog sneezing, gnawing on his/her paws, or agitated? Do you notice watery eyes or red ears? It might have seasonal allergies.

Dogs, like humans, can suffer from seasonal and environmental allergies. The difference is, your dog can’t tell you what’s wrong and this makes it hard to determine the best response. Before we dive into that discussion, let’s learn a little more about allergies.

Straight Talk On Allergies

Allergic reactions occur when your body or your pet’s body is sensitive to allergens in the air or the environment. Dust and pollen, for example, are common allergens. These allergens cause a reaction but aren’t typically dangerous to humans or dogs.

However, your immune system doesn’t know this. It thinks the allergens are harmful and reacts in a way to protect you from them. The body releases histamines, which cause inflammation, swelling, and itching.

This inflammation manifests as the signs we typically associate with allergies, i.e. sneezing, wheezing, runny or stuffy nose, red or runny eyes.

What’s Causing My Dog’s Allergies?

Dogs, like humans, can be allergic to different things. A short list of some of the possible environmental allergens includes:

• Pollen

• Grass

• Weeds

• Mold

• Fungi

• Flea saliva

Dogs can also be allergic to different foods. So, your dog could be allergic to something in the air or on its body or it could be allergic to something it has eaten. Take your dog to the vet for a diagnosis and to find out the best form of treatment for him or her.

What Are The Signs My Dog May Have Allergies?

A dog reacts to allergies somewhat differently than a human does. Your dog may scratch or bite, trying to relieve the itching. You may also notice redness or inflammation in the nose and ear areas.

Other symptoms may include:

• Watery eyes

• Runny nose

• Sneezing

• Difficulty Breathing

• Itchy or flaky skin

• Hair loss

• Itching

• Ear infections

• Shaking their head

• Scratching one or both ears

• Smelly and/or red ears

• Licking of the paws and anus

• Patchy skin or skin irregularities

What You Can Do

If you believe your dog has allergies, take the animal to your vet. Your vet can help identify which allergens are causing the problems and prescribe or recommend antihistamines to help alleviate symptoms.

Benadryl, Claritin, and Zyrtec are often recommended. These are typically safe for dogs, but every dog will react differently, some becoming drowsy and others becoming hyperactive. Watch your dog carefully after giving him or her medicine.

If you decide to get an over-the-counter medicine for your dog, check the label to make sure it doesn’t have decongestants or pseudoephedrine, because these ingredients are NOT safe for dogs.

Because the dosage is different for dogs than for humans, talk to your vet about what to give, how much, and how often.

If your dog has allergens in its fur or on the body, bathing the animal frequently can also be beneficial. There are also prescription medications that treat itching and rashes.

*We may receive a commission for products purchased from links in this website

More from Pollen Sense

A clearer, more helpful Pollen Wise home screen

We’ve been spending a lot of time reviewing feedback, reading survey responses, and looking closely at how people are using Pollen Wise. One common thread amongst the feedback and survey responses stuck out: people want the app to feel easier to understand at a glance, and more helpful in answering the question, “What should I care about right now?” That thinking shaped this latest update. This is a major refresh to the Pollen Wise home screen, and while we know there is still more to improve, this update is an important step. We’re continuing to build, refine, and learn, and your feedback is a big part of what helps us decide where to go next.

Incoming: Branches, Revisions, and Layers

Update: The data cutoff for legacy metrics data was changed from March 11 to March 23, 2026 6PM UTC. Data before that date will continue to be available for the forseeable future, however data after March 23, 2026 6PM UTC will no longer be present either in the legacy portal data viewer or via v1 APIs. Please use the V2 APIs and the Branch/Revision-powered data viewer in the portal for live incoming data

LLMs vs CNNs: Why Physical AI Starts With Data Infrastructure

When we say “AI” at Pollen Sense, most people assume we mean LLMs. We don’t. When people hear that Pollen Sense is building AI data infrastructure, the default assumption is usually large language models, chatbots, text generation, or conversational AI. That’s understandable given the moment we’re in. But it’s not what we mean when we say AI. At Pollen Sense, AI data infrastructure means Physical AI, machine learning systems that directly observe the real world, classify physical signals in real time, and convert them into structured, trustworthy data that other systems can reason on.

Take a Deep Breath

Real-time particulate intelligence for public health, research, and daily life.

Whether you need a sensor network, licensing, or a better allergy experience, the same Pollen Sense infrastructure powers it.