What are the Causes of Long Term Fever and Its Symptoms

Long Term Fever

Generally, a fever or controlled hyperthermia lasts for a few days and is characterized by having a temperature that is above ninety-nine degrees Fahrenheit. However, there are times when fever and its accompanying symptoms persist for weeks. This often indicates that the infection that had caused the fever is still in the body or it may be a warning sign of underlying serious medical conditions.

Treatment options that are needed usually involve administration of antibiotics and antiviral drugs to relieve symptoms. Home care remedies include drinking lots of fluids several times per day to prevent dehydration and help the body fight off the causative agent. Those that are caused by serious medical conditions will need proper evaluation by a qualified health practitioner so as to determine the best treatment to be applied.

Long Term Fever Symptoms

  • Persistent low or high grade fever. Rise and fall of body temperature can also be observed.
  • Headaches
  • Nausea with or without vomiting.
  • Unintentional weight loss due to loss of appetite.
  • Aches all over the body.
  • Fatigue and lethargy.
  • Constipation or diarrhea.
  • Sweating
  • Rashes

Long Term Fever Causes

  • Abscesses. In few instances, abscesses grow within several internal organs like the liver, brain, and the lungs.
    Antibiotics that are used to kill abscesses that are visible on the skin often fail to kill those that are growing inside the body because these will have difficulties in penetrating the abscess wall.
  • Autoimmune Diseases. These diseases make the immune system of the body destroy healthy tissues thinking that these are harmful foreign bodies. Even with the absence of any kind of infection, the immune system reacts as if there is one. Examples include rheumatoid arthritis and lupus which all show symptoms of long term low-grade fevers.
  • Inflammation of the heart and the blood vessels. Subacute bacterial endocarditis which is a serious heart infection caused by a bacteria is an example along with aortic inflammation.
  • Inflammation of the intestines that are caused by inflammatory bowel disorders such as Crohn’s disease, diverticulitis, ulcerative colitis, and enterocolitis.
  • Side effects of certain medications. Common examples of these include antibiotics especially those that contain sulfonamides, antihistamines, psychotropic medications, and some drugs that are used to manage high blood pressure.
  • Sarcoidosis. This is a disease that is described by the formation of granulomas which are nodules or masses in a number of internal organs.
  • Thyroid disorders like hypothyroidism or having an overactive thyroid.
  • Stress and hormonal imbalances.
  • Other diseases such as leukemia, pelvic inflammatory disease, mononucleosis, and tuberculosis.

Long Term Fever Effects

  • Dehydration which can range from mild to severe.
  • Patients will have hallucinations.
  • Febrile seizure. This is a kind of seizure induced by fever and commonly happens in children aging six months to two years.
  • Weakened immune system.

2 thoughts on “What are the Causes of Long Term Fever and Its Symptoms

  • August 3, 2013 at 9:24 pm

    My 38 year old son has been having fever over 12 days. He also has muscle and body pain. The blood test did not detect anything. He has been taking antibiotics but that has not cured him. He takes Epsom salt bath. Also tried vinegar water compresses on his legs, arms, head, neck and chest. There is constant temperature which does not come to normal.

    • August 6, 2013 at 4:08 pm

      Persistent fever for long duration needs detailed investigation. X ray of chest and sonography of abdomen are valuable tests that may help to diagnose the underlying ailment. Also a repeat blood test may be valuable. Fever for long duration may be due to typhoid, tuberculosis and many more ailments. Once the ailment is diagnosed, treatment will become easier.


Leave a Reply

Your email address will not be published. Required fields are marked *