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Let's see if we can figure out what's causing your symptoms.
Select additional symptoms and we'll narrow your results.

Your symptoms:
  • Fatigue
  • Tired

What causes fatigue and tired? 170 possible conditions

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

1

Common Cold Overview

The common cold is a virus that involves symptoms like sneezing, a runny nose and a headache. Learn the causes, symptoms and treatments for the common cold now!

Read more »

2

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 »

3

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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4

Anemia

Anemia happens when the number of healthy red blood cells in your body is too low. Red blood cells carry oxygen to all of the body's tissues.

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5

Congestive Heart Failure (CHF)

Congestive heart failure (CHF) is a chronic condition that affects the chambers of your heart. Learn more about CHF, including symptoms and risk factors.

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6

Sleeplessness

Insomnia is a sleep disorder. Individuals who suffer from insomnia find it difficult to fall asleep, stay asleep, or both. They don't feel refreshed when they wake up from sleeping. This can lead to fatigue and othe...

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7

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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8

Dehydration

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

Dehydration takes place when your body loses more fluid than you drink. The most common cause of water loss from the body is excessive sweating.

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9

Low Blood Sugar (Hypoglycemia)

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

Hypoglycemia, or low blood sugar, is a potentially dangerous condition that's most common in people with diabetes. Learn what causes it and how to prevent it.

Read more »

10

What is Fibromyalgia?

Fibromyalgia is a disorder tied to widespread pain in your muscles and bones, areas of tenderness, and fatigue. Learn about its symptoms, treatment, and more.

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11

Anxiety

Learn more about anxiety with this overview of anxiety disorders.

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12

Obesity

Obesity is an epidemic in the U.S. This condition puts people at a higher risk for serious diseases, such as type 2 diabetes, heart disease, and cancer.

Read more »

13

Chronic Bronchitis

Acute bronchitis causes coughs that produce mucus. You don't need antibiotics, but bed rest and home care can help.

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14

Infectious Mononucleosis

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

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15

Bipolar Disorder

Bipolar disorder is a mental illness marked by extreme shifts in mood ranging from mania to depression. It is also called bipolar disease or manic depression.

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16

Hypothyroidism

The thyroid gland produces a hormone that controls how your cells use energy (metabolize). Hypothyroidism occurs when the body doesn't produce enough. Untreated, it can cause complications like obesity and heart disease.

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17

Low Blood Potassium

Low potassium levels in your blood can cause weakness, fatigue, and abnormal heart rhythms. Find out how to treat hypokalemia.

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18

Low Blood Sodium (Hyponatremia)

Low blood sodium, or hyponatremia, occurs when water and sodium are out of balance in your body. A quick drop in sodium levels can cause weakness, headache, nausea, and muscle cramps.

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19

Congestive (Dilated) Cardiomyopathy

Congestive cardiomyopathy, also known as dilated cardiomyopathy, is characterized by a weak primary pumping chamber in the heart. Your heart automatically attempts to correct for this inefficiency. In turn, thi...

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20

Failure to Thrive

A child is said to have failure to thrive when they don't meet recognized standards of growth. According to Kids Health, failure to thrive isn't a disease or disorder. Instead, it describes a situation in which a chil...

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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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