👉 Nearby infection, also known as a secondary infection, occurs when an existing infection in one part of the body spreads to another, often due to a weakened immune system or breaches in the body's natural barriers. This can happen when bacteria or viruses from the primary infection travel through bodily fluids, lymphatic systems, or wounds to infect nearby tissues. For example, if a person has a urinary tract infection (UTI) and fails to treat it, bacteria can spread to the kidneys, causing a kidney infection (pyelonephritis). Similarly, an initial skin infection like impetigo might lead to a secondary lung infection if not properly managed. Nearby infections can be more severe and harder to treat because they often involve different types of pathogens and can complicate the overall health of the patient.
