A generalized rash is widespread and covers most of the body or is
found on several parts of the body. It may appear in the same place on both
hands, feet, arms, or legs.
Generalized rashes without other symptoms are usually caused by minor
problems, such as dry skin or
contact dermatitis, and occur after contact with soap,
detergent, or fabric. Many generalized rashes will go away with home
treatment.
Many different viruses can cause a generalized rash. Often when a
virus is the cause of a rash, the specific virus that caused the rash is not
known. When this is the case, the virus is called a nonspecific virus.
Other viruses that are common causes of generalized rashes include
chickenpox,
fifth disease, and
roseola. Most rashes caused by viruses are not serious
and usually disappear over a few days to a week. Home treatment is all that is
needed to treat these rashes.
A generalized rash may be a symptom of a chronic skin condition, such
as
eczema or
psoriasis.
A high fever, sore throat, sandpapery rash, and raspberry-textured
tongue may indicate
scarlet fever. Scarlet fever is a childhood disorder
that usually occurs between the ages of 2 and 10. The rash is caused by a toxin
that is present in some strep bacteria. The rash itself does not need
treatment, but the strep infection does. The rash is not contagious, but strep
infection is. Other common strep infections include strep throat and
impetigo.
On rare occasions, even with today's immunizations, there will be an
outbreak of
measles (rubeola) or
rubella (German measles). If a child has a generalized
rash that looks like measles or rubella, especially if there is an outbreak in
the community, call your health professional.
A rash that looks like a sunburn and that starts 2 days after a fever of 102°F (38.9°C) or higher may be caused by a rare condition called toxic shock syndrome.
A very rare and serious type of generalized red rash may cause the
skin to peel away, leaving large areas of skin that weep or ooze fluid like a
severe burn. If this type of rash occurs, a visit to a health professional is
required. The cause may be toxic epidermal necrolysis (TEN), which can occur
after the use of some medications.