5. A fever
This symptom is common in people of all ages who are affected by mono. Though a fever can occur with any type of infection, usually, the fever associated with this illness is high. A fever is one of the body’s first lines of defense in fighting an infection.
The rise in temperature is an attempt to make the body less habitable for the virus, thereby killing it off. In addition to developing a fever, you could also experience cold sweats, chills, and general malaise. If your fever becomes alarming high or lasts for several days, you should see a doctor as soon as possible.