You scratched that bug bite and now it's a big itchier bump. Some science explains why scratching really can make things worse, even if you don't break the skin. University of Pittsburgh researchers put tiny “cones of shame” onto mice to help unravel what happens on a cellular level when an itch gets scratched or not. They discovered immune cells that trigger an itchy allergy reaction can be revved up even more, through a different molecular pathway, when you scratch. For the summer itchiness of bug bites, poison ivy and other types of contact dermatitis, dermatologists recommend anti-itch balms such as hydrocortisone cream, calamine lotion or oatmeal baths.