Watery eyes in dogs, called epiphora, happen when tears do not drain normally or when the eye produces extra tears in response to irritation. Brachycephalic breeds such as Pugs, Bulldogs, and Shih Tzus often have shallow eye sockets and prominent eyes, which can cause tears to spill onto the face even when the eye is basically healthy. Hair rubbing the cornea or folded facial skin can also increase tearing.

Allergic inflammation, smoke, dust, or wind can make eyes water temporarily, sometimes with redness or rubbing at the face. Infections or ulcers usually bring more noticeable redness, squinting, discharge that is thick or colored, or sensitivity to light. These signs warrant same-day veterinary attention because eye injuries can worsen quickly.

A blocked nasolacrimal tear duct prevents normal drainage down the nose, leading to chronic wet streaks on the fur and sometimes secondary skin irritation on the muzzle. Your veterinarian can stain the eye to check corneal health and assess whether flushing or other treatment is appropriate.

Do not use human eye drops without veterinary approval. Keep facial folds gently dry and clean if your vet recommends it, and prevent self-trauma with a cone if needed. Persistent tearing, pain, or vision changes should always be evaluated professionally rather than assumed to be cosmetic alone.