Weakness: Check Your Symptoms and Signs With the Symptom Checker by MedicineNet.com

Weakness Symptoms

Symptom Checker: Symptoms & Signs Index

Medical Author: Melissa Conrad Stöppler, MD

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Symptoms & Signs

Weakness is a decrease in the strength in one or more muscles. In the strictest sense, the medical definition of weakness refers to loss of muscle strength, and this article is focused upon conditions that can result in a measurable loss of muscle function. Weakness may be generalized or may affect one muscle or muscle group exclusively. Diseases of the neuromuscular system, injuries, metabolic diseases, and toxins can all cause of measurable muscle weakness.

Many people use the term weakness as a synonym for tiredness, although this is not technically correct. People suffering from certain medical conditions (for example, cancer or influenza) may describe feelings of total body weakness, referring to feelings of malaise or tiredness, even though no detectable loss of muscle strength is present.

Health concern on your mind? Visit the Symptom Checker.

REFERENCE:

Fauci, Anthony S., et al. Harrison's Principles of Internal Medicine. 17th ed. United States: McGraw-Hill Professional, 2008.

Terms related to Weakness:

Arm Weakness
Leg Weakness
Loss of Strength
Muscle Pain and Weakness
Muscle Weakness
Weakness in Arms
Weakness in Legs

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- What is the impact of strokes?
- What are stroke symptoms?
- What should be done if you suspect you or someone else is having a stroke?
- How is a stroke diagnosed?
- What is the treatment of a stroke?
- What complications can occur after a stroke?
- What can be done to prevent a stroke?
- What is in the future for stroke treatment?
Torn Meniscus A torn meniscus (knee cartilage) may be caused by suddenly stopping, sharply twisting, or deep squatting or kneeling when lifting...learn more »
In This Article
Torn Meniscus Article
- Torn meniscus facts
- Introduction to the knee
- What is a torn meniscus?
- What causes a meniscus to tear?
- What are symptoms and signs of a torn meniscus?
- How is a meniscus tear diagnosed?
- What is the treatment for a torn meniscus?
- Can a meniscus tear heal without surgery?
- What is rehabilitation and recovery like for a patient with a meniscus tear?
- What are recommended exercises once a torn meniscus has been repaired?
Vitamin D Deficiency Vitamin D deficiency has been linked with rickets, cancer, cardiovascular disease, severe asthma in children and cognitive...learn more »
In This Article
Vitamin D Deficiency Article
- What are symptoms, signs, and health risks of vitamin D deficiency?
- What are causes of vitamin D deficiency?
- How is vitamin D deficiency diagnosed?
- What is the treatment for vitamin D deficiency?
West Nile Virus West Nile virus (West Nile encephalitis) is a brain infection caused by a virus. People become infected with the virus after...learn more »
In This Article
West Nile Virus Article
- West Nile virus facts
- What is the history of West Nile virus?
- Where did the West Nile virus come from?
- How do people get West Nile virus?
- How do mosquitoes get infected with the West Nile virus?
- Can one person contract the virus from another?
- Besides mosquitoes, can other insects transmit the West Nile virus?
- Are there any other viruses around like the West Nile virus?
- What are West Nile virus symptoms and signs?
- When is there an increased risk for infection?
- Who is at risk for getting West Nile virus?
- What is the treatment for West Nile virus? Can West Nile virus be prevented with a vaccine?
- Is a woman's pregnancy at risk if she gets West Nile virus?
- What can a community do to reduce the risk of an outbreak of the West Nile virus?
- What can a person do to reduce the risk of becoming infected with the West Nile virus?
Yellow Fever Yellow fever is an infectious disease transmitted by infected mosquitoes. Side effects are rare with the yellow fever vaccine....learn more »
In This Article
Yellow Fever Article
- What is yellow fever? What is the history of yellow fever?
- What causes yellow fever?
- How is yellow fever transmitted?
- What areas are high-risk for contracting yellow fever?
- What is the incubation period for yellow fever?
- What are yellow fever symptoms and signs?
- How is yellow fever diagnosed?
- What is the treatment for yellow fever?
- What is the prognosis for people with yellow fever?
- Can yellow fever be prevented?
- Where can people get more information on yellow fever?
- Yellow Fever At A Glance