Figure 1.

Clinical photographs of herpetic gingivostomatitis (HGS) and herpetiform aphthous ulcerations (HAU). (A and B) Primary HGS in a 25-year-old male patient showing multiple vesicles, erosions, and small or large ulcerations on the whole maxillary and mandibular gingivae and parts of the hard palate. The entire gingiva is enlarged, painful, and extremely erythematous. (C and D) Secondary HGS in two adult male patients demonstrating a cluster of erythematous macules or ulcerations on the focal areas of hard palate. (E, F, G and H) HAU in four adult patients exhibiting groups of small ulcerations on the upper labial mucosa (E), lower labial mucosa (F), ventral tongue mucosa (G), and floor of mouth mucosa (H).