What causes fatigue? 251 possible conditions

Viewing 21 - 40 of 251 results

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

21

Anxiety

What is anxiety? Anxiety often manifests itself as an apprehension about daily life. Learn the basics with this overview of the types of anxiety disorders.

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22

Hypothyroidism

The thyroid gland is an important endocrine gland that controls the body's metabolism. It is a small butterfly-shaped gland located in the front of the neck just below the Adam's apple. The thyroid gland produces th...

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23

Emphysema

Emphysema is a disease of the lungs. It occurs most often in smokers. It also occurs in people who regularly breathe in irritants.

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24

Bleeding

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

Bleeding is the name commonly used to describe blood loss. It can refer to blood loss inside the body (internal bleeding) or blood loss outside of the body (external bleeding). Blood loss can occur in almost any area o...

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25

Iron Deficiency Anemia

Anemia occurs when a person has lower-than-normal levels of red blood cells (RBCs) in the blood. According to the American Society of Hematology, there are many factors that can contribute to lower-than-normal RB...

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26

Seasonal Affective Disorder

Seasonal affective disorder (SAD) is a form of depression. People affected by SAD display symptoms of depression at the same time every year, typically during the fall and winter months. According to the America...

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27

Type 2 Diabetes Overview

Type 2 diabetes, is a common chronic metabolic disease that leads to abnormally high levels of blood sugar in the blood. This blood sugar is also referred to as "glucose."

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28

Urinary Tract Infection

The urinary tract consists of the kidneys, ureters (which connect the kidneys and the bladder), bladder, and urethra. Urinary tract infections (UTIs) can occur in any part of the urinary tract. Most UTIs are caused b...

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29

Coronary Artery Disease (CAD) Overview

Coronary artery disease (CAD) is the leading cause of death in the United States. Learn the definition, symptoms and causes of CAD by reading our overview.

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30

Infectious Mononucleosis

Infectious mononucleosis, often called "mono," is caused by the Epstein-Barr virus (EBV). It typically occurs in teenagers, but you can get it at any age. The virus is spread through saliva, which is why some peopl...

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31

Food Poisoning

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

Every year, millions of people eat food contaminated with bacteria, viruses, or parasites. The result can be food poisoning, an uncomfortable experience characterized by nausea, vomiting, and diarrhea. One in si...

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32

Systemic Lupus Erythematosus

The immune system normally fights off dangerous infections and bacteria to keep the body healthy. An autoimmune disease occurs when the immune system attacks its own body because it confuses it for something foreign...

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33

Pregnancy

Pregnancy occurs when a sperm fertilizes an egg after it is released from the ovary. An egg enters one of the fallopian tubes where it may be fertilized. The egg then enters the uterus where implantation occurs...

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34

Radiculopathy

Radiculopathy refers to disease of the spinal nerve roots. Radiculopathy produces pain , numbness, or weakness radiating from the spine.

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35

Sinus Infections (Sinusitis)

A sinus infection, or sinusitis, is a common condition that affects 31 million people in the United States each year. The infection occurs when your sinuses and nasal passages become inflamed. The sinuses are small ai...

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36

Diabetes Overview

Learn about diabetes symptoms, causes & treatments.

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37

Pneumonia

Pneumonia is an infection in one or both lungs. The infection may be caused by fungi, bacteria, or viruses. Pneumonia causes inflammation in your lung's air sacs, also referred to as alveoli. The alveoli fill with flui...

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38

Becker Muscular Dystrophy

Becker muscular dystrophy is a genetic condition that causes your muscles to become damaged and weakened over time, resulting in loss of muscle tissue. If you have this condition, you could begin to experience problem...

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39

Duchenne Muscular Dystrophy

One of the nine types of muscular dystrophy, Duchenne muscular dystrophy (DMD) is a genetic condition characterized by progressive weakening of voluntary muscles that leads to death. DMD worsens more rapidly than othe...

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40

Cellulitis

Cellulitis is a common bacterial skin infection. Cellulitis may first appear as a red, swollen area that feels hot and tender to the touch. The redness and swelling often spread rapidly. Cellulitis is usually painful.I...

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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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