DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Shingles rash (V1 distribution) on the forehead and eye of a 3-year-old boy. Shingles (herpes zoster) is the result of infection of sensory nerves by the varicella- zoster virus, which also causes chickenpox. The virus can remain dormant in the nerve tracts that emerge from the spine. When re-activated, rashes appear along a single sensory nerve. In the case of V1 distribution, rashes occur along the superior (ophthalmic) sensory nerve, which supplies sensation to the forehead. Blisters also appear. The blisters break, forming ulcers that dry and form crusts (eye). The crusts fall off 2-3 weeks later, leaving pink, healing skin (forehead).
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