What may a systemic illness cause in relation to skin problems?

A systemic illness can lead to increased inflammation in the skin due to the body's immune response to the underlying condition. When an illness affects the body systemically, it often triggers an inflammatory response as the immune system attempts to combat the disease. This inflammation can manifest as redness, swelling, and other skin changes, leading to various dermatological issues.

Increased inflammation can also be a secondary effect of other systemic issues such as hormonal imbalances, infections, or autoimmune diseases, which can further contribute to skin problems. Therefore, understanding the relationship between systemic illnesses and skin inflammation is essential in veterinary pharmacology, as it allows for better diagnosis and treatment plans for animals suffering from both systemic and dermatological issues.

The other options, while related to the complexity of diagnosing skin issues, do not directly address the primary physiological response of the body, which is the increase in inflammation. This makes the focus on increased inflammation the most appropriate answer.