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.
Blood stains on your cotton sheets may happen as a result of a nosebleed, accident or menstrual cycle. Blood stains are a type of protein stain. When protein stains are rinsed or washed in hot water, the hot water cooks the protein, causing it to become set into the fabric fibers.