Hi,
A rash is a reaction of the skin. It can be caused by many things, such as a drug reaction, an infection, or an allergic reaction. Many different agents can cause similar rashes because the skin has a limited number of possible responses.
Very often the associated symptoms , in addition to the rash, help estabilish the diagnosis, such as a history of tick bites, exposure to other ill children or adults, recent antibiotics use, environmental exposures , or prior immunizations.
Most rashes caused by viruses do not harm your child and go away overtime without any treatment .However, some childhood rashes have serious or even life- threatening causes. As a parent, you should be familiar with these rashes. Many rashes can look the same, making difficult to know the exact diagnosis whenever you have a concern, see your Doctor.