Chills, Malaise: 26 Possible Causes
Let's see if we can figure out what's causing your symptoms.
Select additional symptoms and we'll narrow your results.

Your symptoms:
  • Chills
  • Malaise

What causes chills and malaise? 26 possible conditions

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


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.

Read more »


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.

Read more »



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

Read more »


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.

Read more »



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

Read more »


Chronic Bronchitis

Learn about the causes and treatment of acute bronchitis.

Read more »



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.

Read more »


The Atypical Facts About Atypical Pneumonia

Pneumonia is an infection that causes inflammation of the lungs. Atypical pneumonia is a kind that isn't caused by the bacteria that causes typical pneumonia.

Read more »


Infectious Mononucleosis

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

Read more »


Legionnaires' Disease

Legionnaires' disease is a severe type of pneumonia, or lung infection. Learn about its symptoms, causes, treatment, and prevention.

Read more »



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

Read more »


Lyme Disease

Lyme disease is an infectious condition transmitted via tick bite. A "bull's eye" rash at the site of the bite is an early symptom of this disease.

Read more »



Histoplasmosis is a type of lung infection. It is caused by inhaling fungal spores. Spores are found in soil and in the droppings of bats and birds.

Read more »


Bone Infection (Osteomyelitis)

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

Read more »


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.

Read more »


Poisoning Due to Brown Spider Venom (Brown Recluse Spider Bites)

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

Learn about the symptoms of a brown recluse spider bite and how to prevent getting bitten.

Read more »


Systemic Gonococcal Infection

Gonorrhea is a sexually transmitted infection. One of its symptoms is a skin rash containing pink and/or red spots that become filled with pus.

Read more »



Lymphangitis is an inflammation of the lymphatic system, which is part of the immune system. It is a network of organs, cells, ducts, and glands.

Read more »



An empyema is a condition in which pus collects in the pleural space, which is the area between your lungs and the inner surface of your chest wall.

Read more »


The Plague

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

Read more »

This feature is for informational purposes only and should not be used to diagnose.
Please consult a healthcare professional if you have health concerns.