Hello, Welcome to healthcare magic. Impetigo is cased by a bacteria called staphylococci and sometimes streptococci. It could persist on the skin as colinies usually around the nostrils, umbilicus and perianal areas. These are called as carrier sites. If untreated , the colonies could cause repeated infection. You would benefit from taking a course of oral antibiotic like cephalexin or amoxicillin. Apply a topical antibiotic containing 2 % mupirocin twice a day on the lesions as well as on the carrier sites ( mentioned above). Get your sugars checked as diabetes can predispose to recurring impetigo. Dry skin could also be a predisposing factor. Use a good moisturizer if you have dry skin to prevent dryness and scratching which could introduce bacteria into the skin. Hope this helps you. Take care.