Your doctor is generally able to diagnose herpes zoster by the characteristic appearance of the rash and pain associated with it. In most cases, laboratory tests aren’t necessary.
It is important to see an ophthalmologist (Eye M.D.) when herpes zoster occurs on the face because the virus can invade the eye. An ophthalmologist looks for elevated pressure in the eye, inflammation inside the eye, and herpes zoster lesions or sores on the surface of the eye.
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