Scarlet fever is caused by the same bacterial infection that causes strep throat. Scarlet fever's symptoms are a high fever, sore throat, and a red rash that spreads over the body. Scarlet fever will not go away on its own. Immediate treatment is needed -- doctors will treat scarlet fever with antibiotics while the patient gets rest and drinks plenty of fluids. Other home treatments may help ease symptoms. Follow the links below to find WebMD's comprehensive coverage about how scarlet fever is contracted, what it looks like, how to treat it, and much more.