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What causes chills? 77 possible conditions

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


The Plague

The plague is a serious bacterial infection that can be deadly. It's caused by poor sanitation, overcrowding, and large rodent populations.

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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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Colorado Tick Fever

An infected Rocky Mountain Wood tick can spread Colorado tick fever, a viral infection. A faint, occasional rash is one symptom of this condition.

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Adrenergic Bronchodilators Overdose

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

An overdose happens when you take too much of a drug. Whether intentional or accidental, drug overdoses can be life threatening. Adrenergic bronchodilators overdose is when a person has taken too much of a certain typ...

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Q Fever

Q fever, also called query fever, is a bacterial infection caused by the bacteria Coxiella burnetii. The bacteria are most commonly found in cattle, sheep, and goats around the world. Humans typically get Q fever whe...

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Hemolytic Anemia

When dying red blood cells outpace the bone marrow's production in a person, hemolytic anemia occurs. Hemolytic anemia can be extrinsic or intrinsic.

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Hypothermia is a condition that occurs when your body temperature drops below 95 degrees Fahrenheit. Major complications can result from this drop in temperature, including death. Hypothermia is particularly dangerou...

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Aseptic Meningitis

Meningitis is a condition that causes the membranes covering your brain and spinal cord to become inflamed. Sometimes, this inflammation is due to bacterial infection. When bacteria are not causing the inflammation o...

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Transfusion Reactions

A transfusion reaction is a rare condition that occurs when a person receives a transfusion with blood that is not matched to their blood type. This may cause symptoms such as back pain, fever, fainting, or dizziness.

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Discitis, sometimes spelled diskitis, affects the discs between individual bones of the spine (vertebrae). Swelling in the small spaces between these bones (the intervertebral disc spaces) puts pressure on the discs an...

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Pyogenic Liver Abscess

A pyogenic liver abscess (PLA) is a pocket of pus that forms in the liver in response to an infection or trauma. Pus is a fluid composed of white blood cells, dead cells, and bacteria that forms when your body fight...

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Animal Bite

An animal bite can break the skin, resulting in a puncture wound or an open wound. Bites that don't break the skin can cause bruising due to ruptured blood vessels under the skin.

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Tularemia is an infectious disease of wild rodents, squirrels, and rabbits. Humans can become infected by having direct contact with an infected animal or from tick, mosquito, or deer fly bites. The disease is caused b...

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Acute Lymphocytic Leukemia

Acute lymphocytic leukemia (ALL) is the most common cancer in childhood, although it can also occur in adults. ALL is a cancer of the blood and bone marrow. Cancer occurs when abnormal cells in a part of the body begi...

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Chronic Lymphocytic Leukemia

Leukemia is a type of cancer that affects the blood and blood-forming tissues. There are many types of leukemia, each affecting different kinds of blood cells. Chronic lymphocytic leukemia, or CLL, is a cancer of th...

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Chronic Myelogenous Leukemia (CML)

Leukemia is a type of cancer that starts in the blood or blood-forming tissues. There are many different types of leukemia, and treatment is different for each one. Chronic leukemias are slower growing than acut...

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Acute Myeloid Leukemia

Acute myeloid leukemia (AML) is a cancer that occurs in the blood and the marrow of the bones. Marrow is sponge-like material inside the bones that produces blood cells. AML specifically affects the white blood cells o...

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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.