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What causes fatigue and general weakness? 197 possible conditions

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

1

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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2

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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3

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.

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4

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!

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5

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.

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6

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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7

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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8

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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9

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.

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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

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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12

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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13

Bleeding

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

Bleeding, or hemorrhage, is the name used to describe blood loss. It can refer to blood loss inside the body, called internal bleeding. Or it can refer to blood loss outside of the body, called external bleeding...

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14

Pregnancy

Bleeding or spotting, increased need to urinate, tender breasts, fatigue, nausea, and missed period are signs of pregnancy.

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15

Chronic Bronchitis

Learn about the causes and treatment of acute bronchitis.

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16

Generalized Anxiety Disorder

People who suffer from generalized anxiety disorder, or GAD, worry uncontrollably about common occurrences and situations. The condition may also be called chronic anxiety neurosis.GAD is different than normal feeling...

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17

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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18

Diabetes Overview

Diabetes is a group of chronic metabolic diseases caused by defects in insulin production or function. Advanced diabetes may cause stomach pain, nausea, dizziness, and cramps.

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19

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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20

Urinary Tract Infection

UTIs are usually caused by bacteria and can occur in any part of the urinary tract. Symptoms of upper UTIs include pain in the upper back, chills, fever, and nausea.

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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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