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Mononucleosis: Symptoms and Causes

Symptoms

We will now move to look at some of the mononucleosis symptoms to help with easy and early identification of the illness for prompt medical treatment. The early symptoms of mononucleosis are like those of the flu. You might have:

  • Severe fatigue
  • A headache
  • A sore throat, which can be severe
  • Chills followed by a fever
  • Muscle ache. [1]

In addition to those, a patient could also have swollen lymph glands or nodes in the back of the neck, and accompanying the sore throat could be swollen tonsils with small white patches.

After a day or two, you may also have:

  • Swollen lymph nodes and tonsils
  • A measles-like rash on your face or body. It might begin suddenly after you’ve taken amoxicillin for a severe sore throat.
  • Tiny red spots or bruise-like areas inside your mouth, especially on the roof of your mouth (palate)
  • Soreness in your upper left belly because of an enlarged spleen. [2]