Adult Primary Herpetic Gingivostomatitis with Extensive Oral Involvement

The most common presentation of herpes simplex virus type 1 infection is primary herpetic gingivostomatitis (PrHGS), typically seen in children, whereas its manifestation in adults is uncommon and may even be misdiagnosed. A 27-year-old male patient reported with painful intraoral and perioral ulcers, fever, and gingivitis. Clinical examination revealed submandibular lymphadenopathy along with multiple vesicular and ulcerative lesions on the lips, palate, buccal mucosa, and tongue. The patient was treated with topical 5% acyclovir cream, dietary modifications and oral hygiene measures and showed significant healing in 4 days. This case highlights the importance of recognizing atypical adult presentation of PrHGS and patient education to avoid misdiagnosis and ensure timely management.