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.
There can be many reasons for why your pet gets tear stains. Different causes include blocked tear ducts, eye diseases, parasites, bacterial infections, allergies, abnormally shaped eyes and genetic predisposition. The most common cause of tear staining is excessive tearing, a condition called epiphora.