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What causes fever, muscle pain and unintentional weight loss? 12 possible conditions

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



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

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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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Acute HIV Infection

Acute HIV infection is the primary stage of infection by the human immunodeficiency virus. There are several telltale symptoms, one of which is a rash.

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Temporal Arteritis

Temporal arteritis is a condition in which the temporal arteries, which supply blood to the head and scalp, become inflamed or damaged. Scalp sensitivity or tenderness is a symptom.

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Polymyalgia Rheumatica

Polymyalgia rheumatica is an inflammatory disorder that causes pain and stiffness in various parts of the body, including the shoulders, neck, arms, thighs, and hips. The cause of this disorder is unknown.

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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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Endocarditis is inflammation of the inner lining of the heart. Possible symptoms of this condition include pale skin, chills, and night sweats.

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Pulmonary Fibrosis

Pulmonary fibrosis is a condition that causes lung scarring and stiffness. This keeps the body from getting enough oxygen.

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Brucellosis is a rare disease usually spread through ingesting infected raw meat and unpasteurized milk. Back pain, lethargy, chills, and fever may occur and could lead to complications.

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Infective Endocarditis

Infective endocarditis is an infection of the heart, normally caused by bacteria in the blood stream. It is a serious medical condition. If left untreated, the infection can damage your heart and may even cause death.

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Valley Fever (Coccidioidomycosis)

Coccidioidomycosis, also known as valley fever, is a fungal infection that starts in the lungs and can potentially spread to the rest of the body. Fever, chills and sweating are common.

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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.