What causes fever? 221 possible conditions

Viewing 21 - 40 of 221 results

See a list of possible causes in order from the most common to the least.

21

Appendicitis

This condition is considered a medical emergency. Urgent care may be required.

Appendicitis is inflammation of the appendix. It may be acute or chronic. Harrison's Principles of Internal Medicine states that appendicitis is the most common medical emergency in the United States. More than 250,00...

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22

Swine Flu

Swine flu, also known as the H1N1 virus, made headlines in 2009 when it was declared a pandemic (Dandagi & Byahatti, 2011). Pandemics are contagious diseases affecting people throughout the world or on multipl...

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23

Tonsillitis

Tonsils are the two lymph nodes located on each side of the back of your throat. They function as a defense mechanism, helping to prevent infection from entering the rest of your body. When the tonsils themselves becom...

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24

Viral Gastroenteritis

Viral gastroenteritis is an inflammation of the stomach and intestines caused by one of any number of viruses. Also known as the stomach flu, viral gastroenteritis can affect anyone throughout the world. This highl...

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25

Infectious Mononucleosis

Infectious mononucleosis, often called "mono," is caused by the Epstein-Barr virus (EBV). It typically occurs in teenagers, but you can get it at any age. The virus is spread through saliva, which is why some peopl...

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26

Pyelonephritis

Pyelonephritis is a sudden and severe kidney infection. This condition causes the kidneys to swell, can permanently damage the kidneys, and can even be life threatening. It is important to recognize the symptoms so yo...

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27

The Atypical Facts About Atypical Pneumonia

Atypical pneumonia refers to pneumonia (a long infection) that is not caused by the bacteria that cause the "typical pneumonia." Typical pneumonia tends to be more serious than atypical pneumonia. This type of pneumoni...

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28

Pharyngitis

Pharyngitis is inflammation of the pharynx-the back of the throat. This can cause a sore throat, as well as scratchiness in the throat and difficulty swallowing. According to the University of Maryland Medical Center...

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29

Chickenpox

Also known as varicella, chickenpox is a virus that often affects children. It is characterized by itchy red blisters that appear all over the body. Chickenpox was once so common it was considered a childhood rite o...

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30

Cellulitis

Cellulitis is a common bacterial skin infection. Cellulitis may first appear as a red, swollen area that feels hot and tender to the touch. The redness and swelling often spread rapidly. Cellulitis is usually painful.I...

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31

Epiglottitis

This condition is considered a medical emergency. Urgent care may be required.

Epiglottitis is a life-threatening condition characterized by inflamed epiglottis tissue. The epiglottis is made of cartilage and is located at the base of the tongue. It helps prevent food from entering your windpipe...

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32

Measles

Measles, also known as rubeola, is a viral infection of the respiratory system. Measles is a very contagious disease that can spread through contact with infected mucus and saliva. The coughing or sneezing of a...

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33

The Many Sides of Bacterial Gastroenteritis

If you have bacterial gastroenteritis, bacteria have caused an infection in your gut. This usually results in your stomach and intestines becoming inflamed, and you'll probably experience unpleasant symptoms such a...

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34

Crohn’s Disease

Crohn's disease is a chronic bowel disease that causes severe inflammation of the digestive tract. It is associated with abdominal pain, diarrhea, and may affect your quality of life. Crohn's disease is characterized b...

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35

Pelvic Inflammatory Disease (PID)

Pelvic inflammatory disease (PID) is an infection of the reproductive organs in women. The pelvis is located in the lower abdomen and includes the fallopian tubes, the ovaries, the cervix, and the uterus. According t...

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36

Fifth Disease

Fifth disease is caused by a virus that often results in a red rash on the arms, legs, and cheeks. For this reason, it is also known as "slapped cheek disease." It is fairly common and mild in most children, but it ca...

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37

German Measles (Rubella)

German measles, also called rubella, is a rare condition in the United States. With the introduction of the rubella vaccine in the late 1960s, the incidence of German measles has significantly declined. But the diseas...

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38

Empyema

Empyema is a collection of pus (dead cells and infected fluid) inside a body cavity. Usually, this term refers to pus inside your pleural cavity, or "pleural space." The pleural cavity is the thin space between th...

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39

Rhinitis

Rhinitis is inflammation of the nasal cavity lining (inside the nose). It is often caused by allergies. It may also be caused by environmental factors such as pollution, weather changes, stress, infections, and som...

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40

CFS (Chronic Fatigue Syndrome)

Chronic fatigue syndrome (CFS) is a debilitating disorder characterized by intense fatigue that cannot be cured with sleep. Mental and physical activities may cause your symptoms to worsen. When your fatigue cannot b...

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This feature is for informational purposes only and should not be used to diagnose.
Please consult a healthcare professional if you have health concerns.
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