PMN infiltrate is always present. Warthin-Starry stain shows organism. Local destruction or excision of lesions may be useful adjunctive therapy. Discontinue implicated drug or reduce dose. Watch for signs of TEN or erythema multiform major, such as blister formation, tenderness or lesions, or mucosal lesions.
Most common complication is persistent pain.
Other complications include trigeminal nerve involvement with possible blindness, disseminated disease, VZV pneumonia. Viral culture and FA stain. Most common in gay men. Cyclosporin may be useful. Nails and hair can be affected.