Many viruses can cause tiredness, especially as a lingering symptom known as post-viral fatigue, with common culprits including Epstein-Barr Virus (EBV), Influenza, COVID-19 (Long COVID), Cytomegalovirus (CMV), Human Herpesvirus-6 (HHV-6), and various Enteroviruses, with almost any significant infection having the potential to trigger it due to inflammation and immune responses that affect energy production.
For example, following the flu or other types of infections, everyone has experienced a sense of fatigue that can last for days or weeks. The fatigue sensation is thought to be one of the signals for the body to suppress physical activity in order to regain health.
Epstein–Barr virus encephalitis with excessive daytime sleepiness as the main manifestation: Two case reports.
If it's a viral illness, typically symptoms are shorter lasting and classically the symptoms include fever, chills, sore throat, nasal congestion, runny nose, cough, and a lot of times you can have some body aches. A lot of times the symptoms last for maybe three days to a week and then slowly get better over time.
Many infections can cause fatigue, including:
You may be starting to feel better gradually, but it can take several months and sometimes a year or more for people to feel fully recovered from post-viral fatigue.
Call your doctor right away if you notice any of the following signs and symptoms of an infection: Fever (this is sometimes the only sign of an infection). Chills and sweats. Change in cough or a new cough.
Symptoms of COVID-19
a new, continuous cough – this means coughing a lot for more than an hour, or 3 or more coughing episodes in 24 hours. a loss or change to your sense of smell or taste. shortness of breath. feeling tired or exhausted.
Viral infections often develop gradually, such as a cold that starts with a scratchy throat and progresses to a cough and congestion. Bacterial infections, however, tend to appear suddenly and with more intensity. For example, strep throat can cause a severe sore throat and high fever that comes on quickly.
Coughing and Sneezing—Within a few days of a viral infection, the fluid from a runny nose may change color from clear to yellow to green. 4 Mucus is designed to trap offending viruses, which are efficiently and quickly expelled from the body through coughing and sneezing.
One hypothesis for why immune proteins induce sleep alongside their inflammatory roles suggests that sleeping during illness is the body's way of conserving energy. Fevers induced during infection are metabolically demanding.
Prodromal
During this stage, the infectious agent continues replicating, which triggers the body's immune response and mild, nonspecific symptoms. These symptoms can include: low-grade fever. fatigue.
Symptoms of EBV infection can include:
People with ME/CFS often begin with an illness similar to the flu. This has made researchers suspect an infection may trigger ME/CFS. About 1 in 10 people who get infected by Epstein-Barr virus, Ross River virus, or Coxiella burnetti later develop an illness like ME/CFS.
Early warning signs of sepsis include fever or low temperature, chills, rapid breathing or heart rate, confusion, slurred speech, extreme pain or discomfort, clammy/sweaty skin, and reduced urine output, with children potentially showing fewer wet nappies, vomiting, or a non-fading rash. These symptoms, often appearing after an infection, signal a severe body response and require immediate emergency care, as sepsis can rapidly worsen, according to the Mayo Clinic.
You should make a full recovery within 2 weeks – while your body may have fought off the infection successfully, you may not feel 100% for up to 2 weeks after being infected. Most of your symptoms should have subsided by this point, but it's normal to feel weak and tired while your body recovers from the infection.
What are the symptoms of a viral infection?
When do we need antibiotics? Antibiotics are for bacterial infections only. This includes infections such as bloodstream infections, skin abscess/impetigo, bacterial pneumonia, urinary tract infections, streptococcal pharyngitis and some middle ear infections.
Common symptoms of bacterial infection include:
The common cold, the flu, RSV, and COVID-19 are viral respiratory infections that spread easily during certain seasons.
Most persons with hMPV infection have mild symptoms including cough, runny nose or nasal congestion, sore throat and fever. More severe illness, with wheezing, difficulty breathing, hoarseness, cough, pneumonia, and in adults, aggravation of asthma, also has been reported.
Rest: When it comes to viral flu, nothing works like rest. So, give your work and travel rest and sleep. Sleep helps your body fight the virus and get better. Hydration: Load up on fluids.
Signs of an Infection
Your body raises its temperature to fight off the germs. You may feel cold, shiver, or sweat more than usual. Another telltale sign is swelling or redness on your skin. This happens when your immune system sends white blood cells to the infected area.
Some infections caused by bacteria can still get better without antibiotics. You DO NOT need antibiotics for some common bacterial infections, including many sinus infections and some ear infections.
If the infection has spread or you have a generalized infection, you may develop other signs and symptoms, such as fever, fatigue, pain, etc.