Noticing swollen lymph nodes, especially in the neck can be concerning, particularly when they appear alongside fatigue or a sore throat. One common condition associated with swollen lymph nodes is mononucleosis, often called “mono.” While mono is widely known as the “kissing disease,” it can affect anyone and may cause symptoms that linger for weeks. Understanding what mono is, how it presents, and the role swollen lymph nodes play can help you know when to ...