Nausea and vomiting
It is very common to have this symptom, often in association with poor appetite, fatigue, and low-grade fever. However, in some cases, nausea and vomiting may become a worrying symptom, especially when vomiting is violent, also known as projectile vomiting. This is a meningeal symptom, one that signals a probable involvement of the central nervous system, and should be evaluated by a doctor as a complication of mumps.