These are usually viral infections such as:
- Rubella (German measles)
- Chicken pox and shingles
Some serious systemic bacterial infections, such as meningococcal septicaemia, also present with a rash. Many drugs used to treat systemic infections and other conditions may also cause rashes. Petechiae (purpura) associated with fever is a dangerous sign and these children must be referred immediately for investigation and treatment. A purple rash suggests necrotic skin or bleeding into the skin, and should always be taken seriously.