How Long Do You Feel Tired After Mono?

Mono or mononucleosis is an infectious disease caused by the Epstein virus that belongs to the herpes family. It is a contagious disease that may spread through deep kissing, sharing of infected utensils or tableware, coughing, and blood transfusion or organ transplants. Its symptoms include fever, night sweats, headache, sore throat, and many others. Its symptoms develop after four to six weeks of exposure to the virus. This condition is mild disease and resolves by itself in a few weeks to a few months. In a few cases, it may cause serious illness.

How Long Do You Feel Tired After Mono?

How Long Do You Feel Tired After Mono?

Mono is a viral infectious disease followed by the symptoms of fatigue. The patient feels exhausted and tired the whole day. However, the EBV infection resolves in a gradual manner in a period of a few weeks to a few months. Fatigue remains for weeks or months even after the infection is gone. The duration of fatigue is different for different people. In certain cases, fatigue is present for 6 months or more after initial infection. Such cases should be evaluated more to find out the exact cause of fatigue.

If one feels fatigue after initial infection of mono beyond six months, then this condition is known as chronic fatigue syndrome. The possible cause is EBV infection that has caused long-standing impacts on the body.

There can be other disorders that can develop in the fatigue period of mono. These disorders can be obstructive sleep apnea and insomnia. These disorders may aid in more tiredness and unsteady sleep. They should be treated separately to resolve fatigue fast.

Mononucleosis is a contagious disease caused by the virus. It is caused by the Epstein-Barr virus. This disease is a common viral infection less than common cold that affects the general population in their young age. Its symptoms rarely appear in childhood. It shows its presence in adulthood. It is transmitted through exposure to body fluids such as saliva, blood, semen, and urine. It is a mild disease that does not affect the normal activities of daily life. It can resolve by itself. In rare cases, it may become chronic and remain life-long.

Causes Of Mono

The Epstein-Barr virus is the main causative virus of mono. It belongs to the herpes virus family. It is the most common virus that can infect humans in the world. People are exposed to this virus most commonly at their young age as teenagers. In some cases, even if people are exposed to this virus do not develop the symptoms of mono. These people may carry this virus for the rest of their life without having its symptoms.

In children, this virus does not cause symptoms in most of the cases and the infection gets undiagnosed. It represents noticeable symptoms in adults and adolescents in 35-50 % of cases. It spreads to other people by direct contact with blood, saliva, urine or semen.

Symptoms Of Mono

The symptoms do not appear immediately after infection. The duration between catching the infection and appearance of the symptoms is known as the incubation period. It may take four to six weeks to end. The symptoms may remain for one or two months after their appearance.

The symptoms of mono are-

  • Fever
  • Soreness in the throat
  • Swelling in the lymph glands in the neck and armpits
  • Sweating at the nights
  • Headache
  • Fatigue
  • Weakness in the muscles
  • Swelling in the tonsils

It rarely leads to swelling in the spleen and liver. Its symptoms are very similar to Flu.


Mono is a viral disease characterized by a series of symptoms followed by fatigue. Its symptoms may remain for one or two months after initial infection. But the fatigue can last in a few weeks to a few months. Its duration is different in different patients according to the course of the illness. It may last for 6months or more in a few cases.

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Team PainAssist
Team PainAssist
Written, Edited or Reviewed By: Team PainAssist, Pain Assist Inc. This article does not provide medical advice. See disclaimer
Last Modified On:February 3, 2024

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