How can you tell the difference between bug bites and acne?

bug: Bug bites are often itchy or painful, and they are very red. They are located on exposed areas of skins. Acne may be painful, but not itchy and usually has a white head. Acne is usually multiple while bug bites are often single.

Bumps caused by: Bug bites usually itch because of histamine release from foreign material injection. It also may be hard, last longer than a pimple and be less likely to develop into a whitehead.