Mononucleosis, commonly called mono, is a viral infection often caused by the Epstein-Barr virus (EBV). One of the key symptoms of mono is fatigue, but it can also lead to a variety of other symptoms, including fever, sore throat, and swollen lymph nodes. A common question among those experiencing mono is whether it causes a rash. While not everyone with mono will develop a rash, some individuals do experience skin rashes as a secondary symptom ...