Fire ants, wasps, hornets, bees, spiders, and other bugs can bite you and cause uncomfortable symptoms and pain. To figure out what has caused your bug bite, you can look for certain clues and identifiers. Ticks: leave a rash and bull’s eye Mosquitoes: are itchy and cause a raised, pink bump on the skin Beestings: cause a painful, red skin bump surrounded by white, and sometimes a stinger can be stuck in your skin Flea bites: itchy welts usually on the legs Bed bugs: you can see a very small, itchy, red bite mark Spider bites: red skin and swollen bump