Mono can also make the liver swell, which can cause pain in the right side of the abdomen, as well as jaundice (a yellowing of the skin), nausea, vomiting, and poor appetite. The spleen, which is located on the left side of the abdomen, may be affected.

Can mono make you really sick?

For most people, mono isn’t serious, and it improves without treatment. Still, extreme fatigue, body aches and other symptoms can interfere with school, work and daily life. With mono, you might feel sick for about a month.

Is vomiting a symptom of glandular fever?

Fever, but not always chills; the fever caused by an EBV infection is typically low-grade. Swollen lymph glands, also known as lymphadenopathy. A sore throat, also known as pharyngitis. Nausea, vomiting and loss of appetite.