Plaque on the genitals is a symptom of a skin condition that can occur anywhere on the body, but is especially common on the genitals. It is characterized by small, raised, red bumps that may be itchy and uncomfortable. Plaque usually develops gradually, beginning as small, red bumps that eventually coalesce into larger patches of thick, raised skin. It can be caused by a variety of conditions, including fungal infections, bacterial infections, and contact dermatitis. Treatment options vary depending on the underlying cause.