https://www.petmd.com/dog/conditions/systemic/pollen-allergies-dogs
Pollen may be nearly invisible, but for dogs with allergies, it can cause significant discomfort. In fact, it’s one of the most common triggers of seasonal allergies in dogs. Pollen consists of tiny particles released by flowers, trees, grasses, and other plants, and it travels through the air or clings to animals and insects.
Different types of pollen peak during different seasons - trees and grasses in the spring, for example, and other plants in the fall. When dogs inhale pollen or ingest it while grooming, their immune system may mistakenly identify it as a threat, triggering an allergic reaction.
These reactions happen when the body overreacts to a typically harmless substance, causing inflammation and other allergy symptoms. For more detailed insights and ways to help your dog stay comfortable during allergy season, check out the helpful information from PetMD. For pets. By vets.