| | Conditions Treatments | Herpes How many days fever if have a mumps? Mumps is a viral disease that typically causes fever, swollen glands, and fatigue. The fever usually lasts for 1-2 days, but can sometimes last for up to 5 days. Herpes - Related Articles What Chemicals Are Used to Make Solar Panels? What is SUV mean in colon cancer? How to Get Rid of Hoarseness Signs of an Alcoholic Gammagard & Alzheimer's Disease What Rosehip Oil for Acne Is it a sign of pregnancy if you have very bad cramps and your period is late?