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      • Most fever is beneficial, causes no problems, and helps the body fight off infections. The main reason to treat a fever is to increase comfort. Fever is the result of an immune response by your body to a foreign invader. Foreign invaders include viruses, bacteria, fungi, drugs, or other toxins.
      www.medicinenet.com/aches_pain_fever/article.htm
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  2. Fever: Symptoms, treatments, types, and causes

    www.medicalnewstoday.com/articles/168266

    May 05, 2020 · A doctor can diagnose a fever by checking the person’s body temperature, but they will also need to diagnose the reason for the fever. To do so, they will examine the individual and ask them ...

  3. What causes a fever? - Scientific American

    www.scientificamerican.com/.../what-causes-a-fever

    Nov 21, 2005 · Fever is an elevated temperature of the human body that is substantially beyond the normal range. Normal body temperature fluctuates daily from about one degree below 98.6 degrees Fahrenheit to ...

  4. Fever - Symptoms and causes - Mayo Clinic

    www.mayoclinic.org/diseases-conditions/fever/...

    A fever is a temporary increase in your body temperature, often due to an illness. Having a fever is a sign that something out of the ordinary is going on in your body. For an adult, a fever may be uncomfortable, but usually isn't a cause for concern unless it reaches 103 F (39.4 C) or higher.

  5. Fever Facts: High Temperature Causes and Treatments

    www.webmd.com/first-aid/fevers-causes-symptoms...

    A fever-- also known as a high fever or a high temperature -- is not by itself an illness. It's usually a symptom of an underlying condition, most often an infection. Fever is usually associated ...

  6. Fever in babies: 7 things you might not know | BabyCenter

    www.babycenter.com/0_fever-in-babies-7-things...
    • Fever is a rectal temperature of 100.4°F or higher. Your baby wakes up with flushed cheeks, his skin radiating heat. You take his temperature with a digital rectal thermometer, and it reads 99.9 degrees Fahrenheit.
    • Rectal temperatures are the most accurate. You may be reluctant to use a digital rectal thermometer to take your baby's temperature, but this is the best way to get an accurate temperature reading in a baby or child younger than 3 years old.
    • Bacterial or viral fever? The difference matters. A viral fever results when your baby's body is fighting off an illness caused by a virus, whether it's an intestinal infection, the flu, or the common cold, explains Carrie Brown, a pediatrician at Arkansas Children's Hospital in Little Rock, Arkansas.
    • For babies younger than 3 months, fever is urgent. In babies younger than 3 months, a rectal temperature of 100.4 degrees or higher needs to be brought to a doctor's attention as soon as possible, according to the American Academy of Pediatrics (AAP).
    • Treat the symptoms, not the number. Many parents believe that the higher the fever, the sicker the child, but that's not always the case. A baby with a temperature of 103 degrees may appear perfectly comfortable, contentedly playing on his mat, while a baby with a temperature of 101 may be fussy, tired, and need to be held constantly.
  7. 12 Causes Of Fever At Night You Probably Didn't Know ...

    www.boldsky.com/health/disorders-cure/2014/fever...

    Jun 09, 2018 · What causes high fever only at night is a matter of big concern. In case you are suffering from fever at night, you need to check on the symptoms first. The symptoms may be a loss of appetite, irritability, general weakness, dehydration, sweating, headache, chills and shivering, etc.

  8. 8 Possible Reasons of Recurrent Fever in Child | New Health ...

    www.newhealthadvisor.org/recurrent-fever-in...
    • Dental Abscess. An infected tooth can cause a dental abscess to form in the mouth. The infection can cause recurrent fevers when the abscess flares from time to time until the infection invades the bloodstream and becomes constant.
    • Periodic Fever Syndrome. This is a genetic syndrome inherited from parents that causes fever in children without the presence of an infection. It is a gene mutation and most children are perfectly well between flares of the disorder.
    • Cyclic Neutropenia. This disorder occurs when the white blood cell count drops. The white blood cells fight infection in the body by killing off bacteria.
    • Borrelia Burgdorferi. Borrelia is the bacterium that causes Lyme disease. You get this from being bit by an infected tick. It is usually deer ticks that carry borrelia and common on the East coast, although you can get it anywhere in the United States.
    • Crohn's Disease. Crohn's disease is an unexplained inflammation of the digestive tract and colon. It can cause recurrent fever, along with other symptoms.
  9. Chills without Fever: 7 Causes, Treatment, Home Remedies, and ...

    www.healthline.com/health/chills-without-fever

    Jan 28, 2018 ·

    • Exposure to cold. You may experience chills because you are in a very cold place, such as the ocean or a pool, or outside on a chilly day. You can also get chills if your clothing becomes damp or wet.
    • Medication side effect. Chills without fever may result from taking certain medications or combinations of medications. They may also occur if you take the incorrect dosage of an over-the-counter medication, herbal supplement, or prescription drug.
    • Reaction to extreme physical activity. Marathon running or other forms of extreme sports that require intense physical exertion may cause changes to your core body temperature.
    • Hypothyroidism (underactive thyroid) An underactive thyroid is a thyroid gland that doesn’t produce enough of the hormones needed to regulate metabolic rate or support overall health.
    • Hypoglycemia. Hypoglycemia occurs if blood sugar levels dip abnormally low. If you have diabetes, it may be a sign that your medication or diet needs to be adjusted.
  10. Fever in Adults - What You Need to Know - Drugs.com

    www.drugs.com/cg/fever-in-adults

    Feb 03, 2020 · A fever is an increase in your body temperature. Normal body temperature is 98.6°F (37°C). Fever is generally defined as greater than 100.4°F (38°C). What are common causes of a fever? The cause of your fever may not be known. This is called fever of unknown origin. It occurs when you have a fever above 100.9˚F (38.3°C) for 3 weeks or more.

  11. Fever of Unknown Origin (FUOs) by MedicineNet.com

    www.medicinenet.com/unexplained_fevera_difficult...

    But occasionally people develop fevers without an apparent reason. When fevers persist, doctors refer to such a fever as fever of unknown origin. Abbreviated FUO, this unusual form of fever is defined by the presence of fever greater than 38.3°C (101 °F) "off and on" for more than three weeks without specific cause for the fever identified.