- Almost always a unilateral condition
- Usually affect elderly people without any comorbidities, however, if it
occurs in young individuals you need to think about predisposing factors
such as immunodeficiency.
- Vesicles, pustules and crusting ulceration over the trigeminal nerve
distribution.
- It involves the ophthalmic division of trigeminal nerve.
If the tip of the nose is affected, suspect orbital infection.
Hutchinson sign
Treatment: systemic and topical acyclovir