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What causes fever, loss of appetite and unintentional weight loss? 24 possible conditions

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

1

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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2

Lung Cancer Overview

There are two main types of lung cancer: non-small cell and small-cell. Learn about how these lung cancers are caused, your treatment options, and more.

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3

Viral Gastroenteritis

Viral gastroenteritis, also known as the stomach flu, is caused by a number of different viruses. Its symptoms usually last for two to three days.

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4

Liver Cancer

Learn about liver cancer symptoms, types, diagnosis, treatment, and prevention.

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5

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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6

Tuberculosis

Tuberculosis (TB) is a highly infectious disease that primarily affects the lungs. Read more on whom it affects and how to treat it.

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7

Acute HIV Infection

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

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8

Hookworm Infections

Hookworms are parasites that affect the small intestine and lungs. Read more about the symptoms of this infection and treatment options.

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9

AIDS

If left untreated, HIV can lead to AIDS. AIDS weakens your immune system to the point where it can no longer fight off disease and infection. Learn more.

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10

Leukemia

Leukemia is a cancer of the blood cells. Excessive sweating at night, fatigue, weight loss, bone pain, and easy bleeding or bruising are signs of this disease.

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11

Small Cell Lung Cancer

Small cell lung cancer is a very aggressive form of lung cancer. Learn about small cell lung cancer symptoms, risk factors, diagnosis, and treatment.

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12

Systemic Lupus Erythematosus

Systemic lupus erythematosus, the most common form of lupus, is a chronic autoimmune disease that can cause severe fatigue and joint pain. Learn more about it.

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13

Hodgkin's Disease

Learn more about a type of blood cancer called Hodgkin's disease (HD), including its symptoms, causes, diagnosis, and treatments.

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14

Endocarditis

Endocarditis, also known as infective endocarditis, is a condition in which your heart's inner lining is inflamed. Learn about causes and symptoms.

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15

Chlamydia Infection

Chlamydia is a sexually transmitted disease that should be treated quickly in order to avoid complications. It is caused by bacteria that are usually spread through sexual contact. People with chlamydia often don't hav...

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16

Brucellosis

Brucellosis is a disease caused by bacteria from the genus Brucella. Learn more about how this condition is spread, symptoms, and treatment.

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17

Leishmaniasis

Leishmaniasis is a parasitic disease caused by the Leishmania parasite found in sand flies.

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18

Ankylosing Spondylitis

Ankylosing spondylitis is a form of arthritis that primarily affects your spine. It causes severe inflammation of the vertebrae that might eventually lead to chronic pain and disability.

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19

Temporal Arteritis

Temporal arteritis occurs when the temporal arteries, which supply blood to the head and brain, become inflamed or damaged.

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20

Valley Fever (Coccidioidomycosis)

Valley fever is an infection caused by the Coccidioides fungus. Learn about valley fever symptoms, causes, treatment, prevention, and more.

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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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