Mononucleosis, also called “mono,” is a common illness that can leave you feeling tired and weak for weeks or months. Mono goes away on its own, but lots of rest and good self-care can help you feel better.
Mono usually is caused by the Epstein-Barr virus (EBV). It is most often seen in teens and young adults. Children can get the virus, but it often goes unnoticed because their symptoms are mild. Older adults usually don’t get mono, because they have immunity to the virus.
Mono can be spread through contact with saliva, mucus from the nose and throat, and sometimes tears. Because the virus can be spread through kissing, it has earned the nickname the “kissing disease.” If you have mono, you can avoid passing the virus to others by not kissing anyone and by not sharing things like drinking glasses, eating utensils, or toothbrushes.
As soon as you get over mono, your symptoms will go away for good, but you will always carry the virus that caused it. The virus may become active from time to time without causing any symptoms. When the virus is active, it can be spread to others.
Mono can cause the spleen to swell. Severe pain in the upper left part of your belly may mean that your spleen has burst. This is an emergency.
Your doctor will ask you questions about your symptoms and will examine you. You may also need blood tests to check for signs of mono (monospot test) and the Epstein-Barr virus. Blood tests can also help rule out other causes of your symptoms.
Usually only self-care is needed for mono.
- Get plenty of rest. You may need bed rest, which could keep you away from school or work for a little while.
- Gargle with salt water or use throat lozenges to soothe your sore throat.
- Take acetaminophen (such as Tylenol) or ibuprofen (such as Advil) to reduce fever and relieve a sore throat and headaches. Never give aspirin to someone younger than age 20 years, because it can cause Reye syndrome, a serious illness.
- Avoid contact sports and heavy lifting. Your spleen may be enlarged, and impact or straining could cause it to burst.
In severe cases, medicines called corticosteroids may be used to reduce swelling of the throat, tonsils, or spleen.
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