Generally a clinical diagnosis
May consider viral Culture, antigen, PCR of vesicle fluid
Confirm that the patient does not have:<unk>  ophthalmicus<unk>  oticus (Ramsay Hunt syndrome)
Consider further evaluation for immunocompromized state (may be initial presentation of HIV) if:
Disseminated
For skin disseminated is 3 or more dermatomes affected.
Can also disseminate to other organs including liver, lung, and brain.
Atypical illness/severe disease
In immunocompromised patients consider further evaluation for:
Pneumonitis
Hepatitis
Encephalitis<unk>  ophthalmicus<unk>  oticus (Ramsay Hunt syndrome)
Disseminated
For skin disseminated is 3 or more dermatomes affected.
Can also disseminate to other organs including liver, lung, and brain.
Atypical illness/severe disease
For skin disseminated is 3 or more dermatomes affected.
Can also disseminate to other organs including liver, lung, and brain.
Pneumonitis
Hepatitis
Encephalitis
Herpes zoster
Febrile
Smallpox
Diffuse distribution
Measles
Varicella
Erythema infectiosum
Disseminated gonococcal disease