4. Swollen glands
When you develop any type of illness, your glands can swell. The lymph nodes work to remove foreign substances from the body, including viruses, such as mono. You might notice that the glands on either side of your neck are swollen. If they are, this is a sign that your body is hard at work trying to fight off an infection.
Of course, swollen glands are a symptom associated with various illnesses, including strep throat and the flu; however, if your glands are enlarged and you are exhibiting any other signs that are commonly associated with mono, you’ll want to see a doctor.