Red bites in a straight line are often associated with bed bug bites. Bed bugs are small, parasitic insects that feed on the blood of humans and animals while they sleep. A characteristic indicator of bed bug bites is their pattern, commonly observed as a line or cluster. This pattern occurs because bed bugs tend to feed multiple times along the exposed area of skin while the host is immobile. The bites usually measure about 1 to 3 millimeters in diameter and can become itchy and inflamed.
Bed bugs are notorious for their ability to hide in small crevices and can be challenging to spot. They often reside in the seams of mattresses, box springs, and bed frames. Their presence is confirmed by finding live insects, shed skins, or small blood stains on sheets and bedding.