What causes fever? 181 possible conditions

Viewing 21 - 40 of 181 results

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

21

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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22

RSV (Respiratory Syncytial Virus) Infection

Respiratory syncytial virus, or RSV, is a common virus that can affect individuals of all ages. It is more common among children and infants than it is among adults. For adults and healthy children, RSV causes symptom...

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23

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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24

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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25

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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26

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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27

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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28

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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29

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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30

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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31

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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32

Tuberculosis

Tuberculosis (TB) is a potentially fatal contagious disease that can affect almost any part of the body but is mainly an infection of the lungs.

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33

Meningitis

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

Meningitis is an inflammation of the meninges. This is the membrane that covers the brain and spinal cord. Meningitis may occur when fluid surrounding the meninges becomes infected. The most common causes of meningiti...

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34

Leukemia

Leukemia is a cancer of the blood cells. There are several types of blood cells, including red blood cells (RBCs), white blood cells (WBCs), and platelets. Generally, leukemia refers to cancers of the WBCs. Two types o...

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35

Gout Overview

More than 8 million Americans suffer from gout, and incidence of the disease has increased by about half in the last 20 years. Explore our gout learning center and learn more.

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36

Herpes Simplex

The herpes simplex virus, also known as HSV, is an infection that causes herpes. Herpes can appear in various parts of the body, most commonly on the genitals or mouth. There are two types of the herpes simplex virus...

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37

Systemic Lupus Erythematosus

The immune system normally fights off dangerous infections and bacteria to keep the body healthy. An autoimmune disease occurs when the immune system attacks its own body because it confuses it for something foreign...

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38

Hepatitis

Hepatitis is swelling and inflammation of the liver. Hepatitis is most commonly caused by a viral infection. There are, however, other causes of hepatitis. These include autoimmune hepatitis (a disease occurring whe...

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39

Urinary Tract Infection

The urinary tract consists of the kidneys, ureters (which connect the kidneys and the bladder), bladder, and urethra. Urinary tract infections (UTIs) can occur in any part of the urinary tract. Most UTIs are caused b...

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40

Shingles

Shingles is an infection caused by the virus varicella-zoster, which is the same virus that causes chickenpox. Even after chickenpox is treated, the virus may live on in your nerve tissues for years before reactivatin...

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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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