What is the hallmark symptom of genital herpes?

The hallmark symptom of genital herpes is painful blisters or sores in the genital area. This symptom is characteristic of an outbreak caused by the herpes simplex virus (HSV), specifically HSV-2, which is primarily associated with genital infections. The blisters typically appear as small, fluid-filled vesicles that may rupture and become painful ulcers. These lesions are usually accompanied by additional symptoms such as itching or burning in the affected area.

The presence of painful sores is significant because it not only helps in diagnosing genital herpes but also indicates an active infection that is contagious. While other symptoms can occur with genital herpes or may accompany an outbreak, the blisters and sores are the most distinctive and clinically recognized feature of this condition.