Clinical diagnosis, based on history and physical exam
Available laboratory studies (not required for diagnosis):
Viral culture (gold standard)
Direct immunofluorescence
Tzanck smear (poor specificity)
Viral culture (gold standard)
Direct immunofluorescence
Tzanck smear (poor specificity)
Herpes gingivostomatitis
Eczema herpeticum
Tinea capitis
Chancroid
Herpes keratitis
Herpes labialis
Herpes labialis 
Tinea cruris