Learn About Mononucleosis

What is the definition of Mononucleosis?

Mononucleosis, or mono, is a viral infection that causes fever, sore throat, and swollen lymph glands, most often in the neck.

What are the alternative names for Mononucleosis?

Mono; Kissing disease; Glandular fever

What are the causes of Mononucleosis?

Mono is often spread by saliva and close contact. It is known as "the kissing disease." Mono occurs most often or seen in adolescents and young adults, but the infection may develop at any age.

Mono is caused by the Epstein-Barr virus (EBV). Rarely, it is caused by other viruses, such as cytomegalovirus (CMV).

What are the symptoms of Mononucleosis?

Mono may begin slowly with fatigue, a general ill feeling, headache, and sore throat. The sore throat slowly gets worse. Your tonsils become swollen and develop a whitish-yellow covering. Often, the lymph nodes in the neck are swollen and painful.

A pink, measles-like rash can occur, and is more likely if you take the medicine ampicillin or amoxicillin for a throat infection. (Antibiotics should typically not given without a test that shows you have a strep infection.)

Common symptoms of mono include:

  • Drowsiness
  • Fever
  • General discomfort, uneasiness, or ill feeling
  • Loss of appetite
  • Muscle aches or stiffness
  • Rash
  • Sore throat
  • Swollen lymph nodes, most often in the neck and armpit

Less common symptoms are:

  • Chest pain
  • Cough
  • Fatigue
  • Headache
  • Hives
  • Jaundice (yellow color to the skin and whites of the eyes)
  • Neck stiffness
  • Nosebleed
  • Rapid heart rate
  • Sensitivity to light
  • Shortness of breath
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What are the current treatments for Mononucleosis?

The goal of treatment is to relieve symptoms. Steroid medicine (prednisone) may be given if your symptoms are severe.

Antiviral drugs, such as acyclovir, have little or no benefit.

To relieve typical symptoms:

  • Drink plenty of fluids.
  • Gargle with warm salt water to ease a sore throat.
  • Get plenty of rest.
  • Take acetaminophen or ibuprofen for pain and fever.

Also avoid contact sports if your spleen is swollen (to prevent it from rupturing).

Who are the top Mononucleosis Local Doctors?
Family Medicine
Family Medicine
437 N Park Dr, Ste 1, 
Arlington, VA 
 4.7 mi

Lee Martin is a Family Medicine provider in Arlington, Virginia. Dr. Martin and is rated as an Experienced provider by MediFind in the treatment of Mononucleosis. His top areas of expertise are Anemia, Bronchitis, Myelodysplastic Syndrome (MDS), and Mononucleosis.

Steven M. Holland
Infectious Disease
Infectious Disease
Bethesda, MD 
 6.1 mi

Steven Holland is an Infectious Disease provider in Bethesda, Maryland. Dr. Holland and is rated as an Experienced provider by MediFind in the treatment of Mononucleosis. His top areas of expertise are Coccidioidomycosis, Mycobacterium Avium Complex Infections, Disseminated Tuberculosis, Myeloperoxidase Deficiency, and Endoscopy.

 
 
 
 
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James J. Goedert
Internal Medicine
Internal Medicine
1015 University Blvd E, 
Silver Spring, MD 
 6.3 mi

James Goedert is an Internal Medicine provider in Silver Spring, Maryland. Dr. Goedert and is rated as an Experienced provider by MediFind in the treatment of Mononucleosis. His top areas of expertise are Burkitt Lymphoma, Kaposi Sarcoma, HIV/AIDS, B-Cell Lymphoma, and Colonoscopy.

What is the outlook (prognosis) for Mononucleosis?

The fever usually drops in 10 days, and swollen lymph glands and spleen heal in 4 weeks. Tiredness usually goes away within a few weeks, but it may linger for 2 to 3 months. Nearly everyone recovers completely.

What are the possible complications of Mononucleosis?

Complications of mononucleosis may include:

  • Anemia, which occurs when red blood cells in the blood die sooner than normal (hemolytic anemia)
  • Hepatitis with jaundice (more common in people older than 35)
  • Swollen or inflamed testicles
  • Nervous system problems (rare), such as Guillain-Barré syndrome, meningitis, seizures, damage to the nerve that controls movement of the muscles in the face (Bell palsy), and uncoordinated movements
  • Spleen rupture (rare, avoid pressure on the spleen)
  • Skin rash (uncommon)

Death is possible in people who have a weakened immune system.

When should I contact a medical professional for Mononucleosis?

The early symptoms of mono feel very much like any other illness caused by a virus. You do not need to contact a provider unless your symptoms last longer than 10 days or you develop:

  • Abdominal pain
  • Breathing difficulty
  • Persistent high fevers (more than 101.5°F or 38.6°C)
  • Severe headache
  • Severe sore throat or swollen tonsils
  • Weakness in your arms or legs
  • Yellow color in your eyes or skin

Call 911 or the local emergency number or go to an emergency room if you develop:

  • Sharp, sudden, severe abdominal pain
  • Stiff neck or severe weakness
  • Trouble swallowing or breathing
How do I prevent Mononucleosis?

People with mono may be contagious while they have symptoms and for up to a few months afterwards. How long someone with the disease is contagious varies. The virus can live for several hours outside the body. Avoid kissing or sharing utensils if you or someone close to you has mono.

What are the latest Mononucleosis Clinical Trials?
Multi-Center Registry for ME/CFS, Including ME/CFS Following Epstein-Barr Virus-Associated Infectious Mononucleosis (EBV-IM) or Coronavirus Disease 2019 (Covid-19)

Summary: The ME/CFS study (MECFS-R) aims to create a large-scale registry that provides data on epidemiology, phenotypes, and disease trajectories of and health care for ME/CFS at any age in Germany, which can be used for future clinical trials.

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A Phase 1, Randomized, Double-Blind, Placebo-Controlled, Dose Escalation Trial to Evaluate the Safety, Tolerability, and Immunogenicity of V350A and V350B in Healthy Participants.

Summary: Epstein Barr virus (EBV) is a virus which can cause infectious mononucleosis and is associated with certain kinds of cancer and multiple sclerosis. Researchers are looking for new ways to prevent disease related to EBV and have developed a new study vaccine (V350A and V350B). The main goal of this study is to learn about the safety and tolerability of V350A and V350B in healthy adults.

Who are the sources who wrote this article ?

Published Date: March 16, 2024
Published By: Jatin M. Vyas, MD, PhD, Associate Professor in Medicine, Harvard Medical School; Associate in Medicine, Division of Infectious Disease, Department of Medicine, Massachusetts General Hospital, Boston, MA. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.

What are the references for this article ?

Ebell MH, Call M, Shinholser J, Gardner J. Does this patient have infectious mononucleosis?: the rational clinical examination systematic review. JAMA. 2016;315(14):1502-1509. PMID: 27115266 pubmed.ncbi.nlm.nih.gov/27115266/.

Johannsen EC, Kaye KM. Epstein-Barr virus (infectious mononucleosis, Epstein-Barr virus-associated malignant diseases, and other diseases). In: Bennett JE, Dolin R, Blaser MJ, eds. Mandell, Douglas, and Bennett's Principles and Practice of Infectious Diseases. 9th ed. Philadelphia, PA: Elsevier; 2020:chap 138.

Schooley RD, Allen UD. Epstein-Barr virus infection. In: Goldman L, Cooney KA, eds. Goldman-Cecil Medicine. 27th ed. Philadelphia, PA: Elsevier; 2024:chap 348.

Stillwell TL, Weinberg JB. Epstein-Barr virus. In: Kliegman RM, St. Geme JW, Blum NJ, et al, eds. Nelson Textbook of Pediatrics. 22nd ed. Philadelphia, PA: Elsevier; 2025:chap 301.