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Fever: Types, Symptoms & Causes

Fever is the response of the human body’s immune system to an infection, resulting in a higher-than-normal body temperature. An average body temperature ranges between 97° Fahrenheit (36.1°Celcius) and 99° Fahrenheit (37.2°Celcius). You contract a fever when this temperature increases to 100° F or 40°C and above. The degree of severity depends on the rise in temperatures and differs on your age.

Types of Fever

Fever differs based on the causes, severity, and the patient’s age. Some of the common types of fever are as below.

    • Intermittent Fever When your body temperature is inconsistent, it is known as intermittent fever. In this condition, you may have a high fever during the day, while your temperature may be low at night. Such a fever results from bacterial infection and is further categorised as quotidian, tertian, and quartan fever, depending on the intensity.
    • Remittent Fever Remittent fever is when body temperature remains consistently high, irrespective of day or night. It also fluctuates by more than 1°C every few hours. The condition results from bacterial infections like typhoid, infectious mononucleosis, brucellosis, etc.
    • Sudden Fever Sometimes, the temperature rise is not constant. Your body may experience a high temperature suddenly due to tiredness, fatigue, headache, body ache, etc. This condition makes you feel feverish, but is mostly temporary.
    • Continuous Fever Continuous fever is similar to remittent fever with regards to temperature fluctuations. However, it could also cause additional symptoms like pneumonia, urinary tract infection, dengue, etc.
    • Relapsing Fever This condition occurs when your body temperature spikes after a few days or weeks of being normal. It commonly happens with underlying infections like malaria.

Common Symptoms of Fever

You may notice the following bodily signs when you have a fever:

  • Excessive sweating
  • Chills and shaking
  • Weakness
  • Body ache
  • Dehydration
  • Loss of appetite
  • Flushed face and hot skin
  • Vomiting

Causes of Fever

The primary reasons leading to fever are as follows:

  • Viral infections
  • Side effects of specific medications
  • Hyperthyroidism
  • Heat exhaustion
  • Inflammatory conditions like rheumatoid arthritis
  • Immunisation shots like tetanus, diphtheria, acellular pertussis (DTaP), etc.
  • Infections targeting organs like ears, throat, lungs, bladder, and kidneys.
  • Teething in babies

Severe Complications Resulting from Fever

Some of the extreme complications of fever are as follows.

  • Hallucinations When you have a severe fever, the brain cells become hyperactive and respond differently to stimuli. The could result is minor episodes of hallucinations.
  • Seizures Usually prevalent in children aged between six months to five years, a febrile seizure is one of the common complications of severe fever. It causes loss of consciousness, muscular tension, twitching, etc.
  • Dehydration The fluid requirement of your body increases when you feel feverish. When you fail to meet it, your lips and mouth area becomes dry, the urinary function becomes irregular, and begin to feel lethargic.

How to Take a Fever Temperature?

You can go through these steps to check your fever temperature.
1. Clean the tip of the thermometer with cold water and rinse it thoroughly.
2. Place the thermometer in your mouth, underarms, or ear. For infants, you can also insert the thermometer in the rectum to check for baby fever.
3. Wait for about 30 seconds. If your thermometer alerts through a beep, wait until you get the signal.
4. Record the temperature reading and repeat the procedure a few times to assess the progress.
5. After checking the temperature, clean the thermometer for future use.

When Should You Visit The Doctor For Fever Treatment?

The body’s immune system fights back, and the condition subsides when the temperature rises minimally. But if you notice the following signs, you should make haste and visit your doctor.
In Adults:

  • Persistent headache
  • Unusual reaction to bright light
  • Increased mental irritability that interferes with accomplishing daily tasks
  • Pain while urinating
  • Recurring episodes of vomiting
  • Body rash
  • Breathing difficulties

In Children:

  • Confusion or inability to maintain eye contact
  • Loss of appetite for longer than usual
  • Irritable digestive condition
  • Seizure attack
  • Fever lasting for days

In Infants:

  • If the rectal temperature increases above 100.4°F in babies younger than three months.
  • When the rectal temperature is higher than 102°F with signs of irritability, discomfort, and sluggishness in infants aged between three months to six months.
  • Rectal temperature above 102°F accompanied by a runny nose, nausea, cough, and other concerning symptoms in babies aged between seven to 24 months.

Practices to Prevent the Occurrence of Fever

Here are a few measures you can take to prevent the occurrence of fever.

  • Wash your hands thoroughly for at least 20 seconds before and after eating.
  • Avoid touching your face area. Stay safe and protect yourself from infections in public places.
  • Cover your mouth and nose when you sneeze, cough or encounter someone doing the same.
  • Change habits like sharing your glass, cup, and other utensils with others.

FAQs

Is fever treatable at home?

Yes, you can treat fever at home if you have a mild temperature. Treatment involves drinking lots of fluids, taking a lukewarm bath, keeping yourself cosy, and getting enough rest.

Is it okay to travel when I am down with a fever?

While you can travel when you have a fever, you should avoid it if you can. You run the risk of infecting other travellers when commuting publicly. Also, the discomfort and strain caused during the journey can worsen your condition.

Which part of the body is highly affected by fever?

The hypothalamus, located in the human brain, bears the most significant impact due to fever. It is responsible for controlling your body's temperature. But in response to an infection or illness, the hypothalamus resets the body's temperature when you have a fever.

What should I avoid when I have a fever?

You should avoid straining yourself, taking unprescribed medicines, starving yourself, and drinking less water when you have a fever.

What should I eat during a fever?

You can eat food like steamed vegetables, fruits, proteins, etc. You can also try incorporating healthy soups, herbal teas, and broths in your diet for quick recovery.

Dr.William Lewis Aliquam sit amet dignissim ligula, eget sodales orci. Etiam vehicula est ligula, laoreet porttitor diam congue eget. Cras vestibulum id nisl eu luctus. In malesuada tortor magna, vel tincidunt augue fringilla eget. Fusce ac lectus nec tellus malesuada pretium.

MBBS (Bachelor of Medicine & Bachelor of Surgery) Gold Medalist (2009-2015) M.D In General Medicine (2016-2019), CCID (Infectious Diseases)

PG Diploma In Clinical Endocrinology v& Diabetes, Clinical Associate in Non-Invasive Cardiology

Dr.William Lewis Aliquam sit amet dignissim ligula, eget sodales orci. Etiam vehicula est ligula, laoreet porttitor diam congue eget. Cras vestibulum id nisl eu luctus. In malesuada tortor magna, vel tincidunt augue fringilla eget. Fusce ac lectus nec tellus malesuada pretium.

MBBS (Bachelor of Medicine & Bachelor of Surgery) Gold Medalist (2009-2015) M.D In General Medicine (2016-2019), CCID (Infectious Diseases)

PG Diploma In Clinical Endocrinology v& Diabetes, Clinical Associate in Non-Invasive Cardiology

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