Fever, Malaise: 67 Possible Causes
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What causes fever and malaise? 67 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

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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3

Sinus Infections (Sinusitis)

A sinus infection causes the sinuses and nasal passages to become inflamed. Facial swelling is a common sign of this type of infection.

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4

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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5

Chronic Bronchitis

People often develop acute bronchitis after a viral chest infection. Blue-colored lips ankle or foot swelling can result.

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6

Hepatitis

Hepatitis refers to an inflammatory condition of the liver. It's commonly caused by a viral infection, but there are other possible causes of hepatitis.

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7

Shingles

Shingles is an infection caused by the varicella-zoster virus, which is the same virus that causes chickenpox. Chickenpox can live on in your nervous tissues.

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8

Acute HIV Infection

Acute HIV infection occurs soon after someone is infected with HIV. Learn about acute HIV infection symptoms, diagnosis, treatment, and prevention.

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9

Malaria

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

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10

Systemic Lupus Erythematosus

Systemic lupus erythematosus (SLE) is an autoimmune disease and the most common type of lupus. One of its common symptoms is a rash on the cheeks and nose called a "butterfly rash."

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11

Obstructive Uropathy

Obstructive uropathy happens when your urine flow reverses direction due to a blockage in a ureter.

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12

AIDS

There are many symptoms of the autoimmune disease HIV/AIDS, including persistent skin rashes, night sweats, and mouth sores.

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13

Non-Hodgkin’s Lymphoma

Non-Hodgkin lymphoma (NHL) is a cancer of the lymphatic system that occurs when tumors develop from the lymphocytes, which are a type of white blood cell.

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14

Dengue Hemorrhagic Fever

Dengue virus rarely causes death. However, the infection can progress into a more serious condition known as severe dengue or dengue hemorrhagic fever.

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15

CFS (Chronic Fatigue Syndrome)

Chronic fatigue syndrome (CFS) is a debilitating disorder characterized by extreme tiredness that can't be explained by an underlying medical condition.

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16

Ebola Virus and Disease

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

Ebola disease is a rare, often fatal illness. One of its late-stage symptoms is a bleeding rash over the entire body.

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17

Bone Infection (Osteomyelitis)

A bone infection may occur when bacteria or fungi invade the bone, causing many symptoms, including fever, redness, stiffness, and swelling.

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18

Neutropenia

Neutropenia is an abnormally low level of neutrophils in the blood. Neutrophils are white blood cells produced in bone marrow and make up about 60% of blood.

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19

Infectious Mononucleosis

Infectious mononucleosis, or mono, refers to a group of symptoms usually caused by the Epstein-Barr virus (EBV).

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20

Pyelonephritis

Pyelonephritis is an inflammation of the kidney and upper urinary tract. Symptoms include flushed skin, back pain, fever, and nausea.

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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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