"Erythema migrans, a rash with a great ability to spread through the skin, is a hallmark of Lyme disease, a serious bacterial ...

You may see a tiny pinprick or two fang marks at the area of the bite. Over the course of a few hours, the skin may start blistering and the red or purplish color can radiate out from the bite site.

Bedbugs don't always leave obvious bites. With pictures of bedbug bites, experts share common symptoms and tips to identify them, plus prevention strategies.

Appearance: Bed bug bites can look like small red marks on light skin, or dark spots on darker skin, and often appear as clusters of 3 to 5 bites in a zig-zag or line pattern. Bed bug bites often ...