Most common rashes can develop regardless of age. But one in particular is problematic for the senior population.
Shingles is a serious condition that can develop in older people who have the herpes zoster virus, aka chicken pox.
Of course, chicken pox mostly occurs in children. But once a person has had chicken pox, the virus remains dormant in his or her body forever [source: Mayo Clinic].
With shingles, a red rash develops on the face or body, eventually becoming blisters. Unfortunately, that's not the worst part: Shingles can be extremely painful because it affects the nervous system, where the herpes zoster virus lies dormant [source: National Institute on Aging].