Fever, Headache, Vomiting: 30 Possible Causes
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What causes fever, headache and vomiting? 30 possible conditions

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

1

Cold and Flu Overview

Common colds and influenza are contagious infections that affect the respiratory system. Both are airborne illnesses, spread through coughing and sneezing. Shared symptoms include headache, cough, sore throat, and more.

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2

Food Poisoning

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

Food poisoning occurs when you consume foods contaminated with bacteria, viruses, or parasites. Symptoms are usually uncomfortable but not severe.

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3

Meningitis

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

Meningitis can affect you differently depending on your age. Learn more about the symptoms and risk factors for each age group.

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4

Strep Throat

Strep throat is a bacterial infection that causes inflammation and pain in the throat. This common condition is caused by group A Streptococcus bacteria.

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5

Swine Flu

Swine flu, or H1N1, is highly contagious and can spread quickly from person to person. A simple sneeze may cause thousands of germs to spread through the air. Symptoms are similar to regular influenza.

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6

Dengue Fever

Dengue fever is a disease that affects much of the tropical region and is caused by one of four dengue viruses. A skin rash between two and five days after the initial fever is a common symptom.

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7

Encephalitis

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

Encephalitis is an inflammation of the brain tissue. It's most often caused by viral infections. In some cases, bacterial infections can cause encephalitis.

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8

Malaria

Malaria is a life-threatening disease. It's typically transmitted through the bite of an infected Anopheles mosquito.

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9

Caffeine Overdose

The recommended amount of caffeine is usually 400 mg per day for healthy adults. Caffeine overdose may occur if you ingest more than this amount.

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10

Tonsillitis

Tonsillitis can occur at any age and is a common childhood ailment. It is most often diagnosed in children from preschool age through their midteens.

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11

Fifth Disease

Fifth disease is common in children. It causes a red rash on the arms, legs, and cheeks, and a virus called parvovirus B19 causes it.

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12

Adult Brain Tumor

A brain tumor is the growth of abnormal cells in your brain. Whether the growth is cancerous or not, any brain tumor is serious. Symptoms can include both cognitive and physical control problems.

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13

Alcohol Withdrawal Delirium

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

Alcohol withdrawal delirium (AWD) is the most serious form of alcohol withdrawal. It causes sudden and severe problems in your brain and nervous system. Approximately five percent of hospital patients being treated fo...

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14

Addisonian Crisis (Acute Adrenal Crisis)

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

An Addisonian crisis occurs when levels of cortisol suddenly drop. Learn more about an Addisonian crisis, including symptoms, risk factors, and treatment.

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15

Hepatitis A

Hepatitis A is inflammation of the liver caused by the hepatitis A virus. This is an acute (short-term) type of hepatitis, which usually requires no treatment.

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16

Toxic Shock Syndrome

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

Toxic shock syndrome is a rare but serious condition caused by a bacterial infection. Read more about its causes and symptoms and when to see a doctor.

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17

Giardiasis

Giardiasis is an infection in your small intestine caused by microscopic parasites called giardia.

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18

Shigellosis

Shigellosis is a bacterial infection that affects the digestive system. The Shigella bacterium is spread through contact with contaminated feces.

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19

Scarlet Fever

Scarlet fever is an infection that can develop in people who have strep throat. Learn about the symptoms, treatment, complications, and prevention of scarlet fever.

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20

Weils Disease

Weil's disease is a severe form of the bacterial infection leptospirosis, which can lead to organ failure and bleeding. Symptoms include nausea, fever, headache, and jaundice.

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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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