What is sti that starts with a chancre?

A sexually transmitted infection (STI) that starts with a chancre is syphilis. The primary stage of syphilis is marked by the appearance of a painless sore called a chancre at the site of infection, typically on the genitals, anus, or mouth. If left untreated, syphilis can progress to more severe stages, leading to serious health complications. Early detection and treatment with antibiotics are crucial for effective management.