(NEXSTAR) – Measles, one of the most contagious viruses in the world, is often recognized by the rash it gives patients who are infected. However, those spots and bumps usually don’t appear for more ...

Viral skin rashes (also known as viral exanthems) can cause itching, irritation, and pain — and possibly symptoms like fever or fatigue. Unlike allergic rashes, which happen when your immune system ...