What is a common sign of a tick infestation?

A common sign of a tick infestation is skin irritation. When ticks attach to the skin, they can cause localized reactions such as redness, swelling, or itching. These symptoms occur as the body's immune system responds to the saliva or the presence of the tick itself. Long-term exposure to ticks can lead to more severe reactions or even the transmission of diseases, making it important to identify and address any skin irritation, particularly in areas where ticks are prevalent.

In contrast, the other choices do not typically relate to ticks. Visible holes in clothes are more indicative of other pests, such as moths or rodents, which damage fabrics. Dust accumulation is generally associated with poor cleanliness or other indoor pests, not ticks. Increased mosquito activity does not indicate ticks specifically; rather, it reflects a separate concern regarding flying insects that breed in standing water. Thus, skin irritation stands out as a direct result of tick bites and a clear indicator of their presence.