Unexpected Weight Loss
It is very usual for people with mononucleosis to lose their weight unexpectedly. This can occur quickly over a few days or weeks. The loss of appetite and a sore throat can be the major reason for this symptom. In addition, an enlarged spleen could cause a feeling of fullness or discomfort in your abdomen, which subsequently diminishes the appetite. Also, the infection can trigger diarrhea and nausea, both of which could make you lose a few pounds. It is important to consult your doctor as soon as possible to prevent malnutrition and other serious complications on the body. [12]
