You may apply antibacterial ointment, but wash your hands well after applying it. Treating the rash with antibiotics will help the infection go away faster and also will prevent spread to others. The itching that often comes with the impetigo rash sometimes provides an added incentive to get the rash treated quickly. No lab tests are required. The physician will typically prescribe oral or topical antibiotics or both.
Complications occur very infrequently.
A potentially serious complication is inflammation of the kidney. This can occur because of a complex immune reaction to the bacteria. You can prevent impetigo by avoiding contact with others who have impetigo. It also helps if you keep your skin clean, dry, and avoid scraping or injuring your skin. Use the medication your physician prescribes.