Scarlet fever, also known as scarlatina, is an infection that can develop in people who have strep throat. It results when the bacteria release a toxin that causes a rash. Scarlet fever usually causes a sore throat and a bright red rash that may be harder to see in people with darker skin.

Scarlet fever is a bacterial illness that develops in some people who have strep throat. Also known as scarlatina, scarlet fever features a bright red rash that covers most of the body. Scarlet fever almost always includes a sore throat and a high fever.