What Causes Impetigo?

Impetigo is caused by two types of bacteria, Staphylococcus aureus and Streptococcus pyogenes. These bacteria live harmlessly in the environment, as well as on the skin unless able to enter through a cut, wound, or even an insect bite. Once infected, you are contagious and can easily spread the disease to others who may come in contact with the sores themselves, or items used by you during the time of your outbreak.