Lesions of monkeypox affect the oral mucosa in approximately 70% of infected patients and reported as the first clinical sign of the disease, manifesting as macules, papules, vesicles, or blisters, which are highly contagious and are followed by the appearance of lesions on the face and extremities of the body. These lesions have clinical aspects like recurrent herpes simplex, herpes zoster, and secondary syphilis and should be part of differential diagnoses. The clinical course after initial oral manifestation is shown to support the clinical diagnosis.