Chronic stress, or a constant stress experienced over a prolonged period of time, can contribute to long-term problems for heart and blood vessels. The consistent and ongoing increase in heart rate, and the elevated levels of stress hormones and of blood pressure, can take a toll on the body.
Excess Tearing. The most common cause of tear stains in dogs is excess tearing or epiphora, which makes the hair and skin around the eyes damp. This can lead to the growth of bacteria and yeast. Red yeast, which produces a reddish brown discoloration of the face, is a common cause of tear stain problems.
What causes tear stains under a dogâs eyes? Excessive tearing can occur as a result of irritation to your dogâs eyes or because your dogâs tears are not draining properly. Just as your eye waters if a speck of dust blows into it, dogsâ eyes will make tears when irritated to flush away anything harmful.