What is a common symptom associated with HZO infection?

In HZO (Herpes Zoster Ophthalmicus) infection, the hallmark symptom is pain and altered sensation in the forehead area, often manifesting unilaterally, meaning it typically affects only one side of the forehead. This occurs because HZO is a reactivation of the varicella-zoster virus that affects the ophthalmic branch of the trigeminal nerve, leading to dermatological and neurological symptoms in the innervated area.

Patients commonly report a burning or throbbing pain, as well as sensory changes, such as tingling or numbness on the affected side. The unilateral nature of these symptoms is significant in distinguishing HZO from other potential conditions and aligns with the typical presentation of herpes zoster infections, where symptoms primarily affect a specific dermatome.

Other options do not accurately reflect common symptoms of HZO. Respiratory distress is not associated with this viral infection, nor is immediate loss of vision a typical onset symptom. While vision issues can manifest if the virus progresses, they generally develop after the initial symptoms have occurred, rather than presenting instantly. Additionally, pain and altered sensation on both sides of the forehead are not characteristic of HZO, as the virus typically affects only one side due to its nerve root implications.