Lower Energy Levels

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Reviewed By:

Yoshinori Abe

Yoshinori Abe, MD (Internal medicine)

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Content updated on Sep 6, 2022

About the symptom

Another name for decreased energy levels is fatigue. Several medical conditions, such as heart disease, many types of cancer, autoimmune diseases such as lupus and multiple sclerosis, and anemia (too few red blood cells), include low energy as a symptom. Fatigue can also be a symptom of sadness or anxiety or a side effect of certain medications.

When to see a doctor

Seek professional care if you experience any of the following symptoms

  • Change in personality

  • Disorder of consciousness

  • Decrease in sleeping desire

  • Seizure attack

  • Difficulty breathing / breathlessness

  • Numbness / sensory disorder

  • Recent weight loss

  • Suicidal thought

Possible causes

  • Sleep disorder

    Sleep disorders are conditions that affect the quality, timing or duration of your sleep, impacting your ability to function when you are awake. There are many types of sleep disorders, they include disturbances in the quality or quantity of sleep or excessive daytime sleepiness, abnormal behaviors that occur during sleep, sleep disorder related to a mental disorder and many more.

  • Schizophrenia

    A psychological disorder where there is altered brain function. The exact cause is unknown, but a combination of genetic, psychological and environmental factors are likely responsible.

  • Adjustment disorder

    A psychological disorder, often with low mood and anxiety. It is triggered by a sudden change in life circumstances, e.g. divorce or losing a job.

  • Acute tonsillitis / pharyngitis
  • Depression
  • Bipolar disorder
  • Depressive
  • Hyperventilation syndrome . panic disorder

Related serious diseases

  • Hyponatremia

    Hyponatremia occurs when the concentration of sodium in the blood is abnormally low. Sodium is an electrolyte, and it helps regulate the amount of water that's in and around the cells.

  • Hypocalcemia

Questions your doctor may ask about this symptom

Your doctor may ask these questions to check for this symptom

  • Do you feel like your energy levels has fallen? For examples, feeling less energetic and less active.

Other Related Symptoms

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Reviewed By:

Yoshinori Abe

Yoshinori Abe, MD (Internal medicine)

From our team of 50+ doctors

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Developed by doctors.

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