Pediatric Nurse Practitioner Practice Exam

Pain level of the lesions is the key clue when distinguishing a primary syphilis chancre from genital herpes lesions. A chancre is typically a single, painless ulcer with an indurated edge and a clean base, and it often has minimal surrounding inflammation. In contrast, initial herpes outbreaks produce painful lesions, usually as grouped vesicles that ulcerate, forming shallow, painful ulcers on an erythematous base, often with significant discomfort and sometimes systemic symptoms. Because pain is such a consistent and practical differentiator in these early lesions, the statement that the syphilis chancre is painless while HSV genital lesions are painful best distinguishes the two.