Lethargic
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Reviewed By:

Unnati Patel, MD, MSc

Unnati Patel, MD, MSc (Family Medicine)

Dr.Patel serves as Center Medical Director and a Primary Care Physician at Oak Street Health in Arizona. She graduated from the Zhejiang University School of Medicine prior to working in clinical research focused on preventive medicine at the University of Illinois and the University of Nevada. Dr. Patel earned her MSc in Global Health from Georgetown University, during which she worked with the WHO in Sierra Leone and Save the Children in Washington, D.C. She went on to complete her Family Medicine residency in Chicago at Norwegian American Hospital before completing a fellowship in Leadership in Value-based Care in conjunction with the Northwestern University Kellogg School of Management, where she earned her MBA. Dr. Patel’s interests include health tech and teaching medical students and she currently serves as Clinical Associate Professor at the University of Arizona School of Medicine.

Yoshinori Abe, MD

Yoshinori Abe, MD (Internal Medicine)

Dr. Abe graduated from The University of Tokyo School of Medicine in 2015. He completed his residency at the Tokyo Metropolitan Health and Longevity Medical Center. He co-founded Ubie, Inc. in May 2017, where he currently serves as CEO & product owner at Ubie. Since December 2019, he has been a member of the Special Committee for Activation of Research in Emergency AI of the Japanese Association for Acute Medicine. | | Dr. Abe has been elected in the 2020 Forbes 30 Under 30 Asia Healthcare & Science category.

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Content updated on Apr 4, 2024

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People with similar symptoms also use Ubie's symptom checker to find possible causes

  • Feel uncomfortable

  • Muscles become tired when I do repetitive things like brushing teeth or combing hair

  • Suddenly feeling tired or fatigued in the middle of the day, then it gets better

  • Feeling more tired/fatigued in the morning than at other times of the day

  • Feeling very tired in the morning even though I slept well

  • Muscles don't work well in the evening

  • A tendency to lose strength

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About the Symptom

It describes an overall feeling of exhaustion or lack of energy. People who are tired feel so drained that their exhaustion interrupts their daily life.

When to see a doctor

Seek professional care if you experience any of the following symptoms

  • Difficulty breathing / breathlessness

  • Recent weight loss

  • Unexplained weight loss of 5% or more in 1 month

  • Jaundice

  • Seizure attack

  • Melena (black stools)

  • Peripheral cyanosis

Possible Causes

Generally, Lethargic can be related to:

  • Drug-Induced Hypersensitivity Syndrome

    Drug-induced hypersensitivity syndrome, also known as drug rash with eosinophilia and systemic symptoms (DRESS), is a severe reaction to a drug marked by fever, rash, and multiorgan failure. It can happen between 1-8 weeks after taking the drug. Drugs that most often cause DRESS include certain anti-seizure medications like carbamazepine, phenytoin, and phenobarbital, as well as allopurinol, which is used for gout.

  • Rabies

    Rabies is a deadly viral disease that can spread to people and animals through bites or scratches from infected animals. It is commonly found in wild animals like stray dogs, bats, raccoons, skunks, and foxes. The rabies virus travels through nerve cells to the brain, where it multiplies quickly, causing severe inflammation of the brain and spinal cord, often leading to death.

  • Cancer Pain

    Cancer pain occurs when cancer grows into or invades nearby bone and tissue. As the cancer expands, it can press on surrounding nerves, bones, and organs, causing pain. The tumor can also release chemicals that cause pain.

  • Alcoholic Liver Disease
  • Watery Diarrhea, Hypokalemia, and Achlorhydria (WDHA) Syndrome
  • Fatigue (Overwork)
  • Hyperemesis Gravidarum

Related serious diseases

Sometimes, Lethargic may be related to these serious diseases:

  • Meningitis

    Meningitis is an inflammation of the fluid and membrane (meninges) surrounding the brain and spinal cord usually caused by bacterial or viral infections, brain injuries, cancer, and certain drugs. It is a medical emergency that can lead to permanent brain and nerve damage.

  • Cyclic Vomiting
  • Heatstroke

Doctor's Diagnostic Questions

Your doctor may ask these questions to check for this symptom:

  • Do you feel you fatigued?

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Find Similar Symptoms

Similar symptoms or complaints

Reviewed By:

Unnati Patel, MD, MSc

Unnati Patel, MD, MSc (Family Medicine)

Dr.Patel serves as Center Medical Director and a Primary Care Physician at Oak Street Health in Arizona. She graduated from the Zhejiang University School of Medicine prior to working in clinical research focused on preventive medicine at the University of Illinois and the University of Nevada. Dr. Patel earned her MSc in Global Health from Georgetown University, during which she worked with the WHO in Sierra Leone and Save the Children in Washington, D.C. She went on to complete her Family Medicine residency in Chicago at Norwegian American Hospital before completing a fellowship in Leadership in Value-based Care in conjunction with the Northwestern University Kellogg School of Management, where she earned her MBA. Dr. Patel’s interests include health tech and teaching medical students and she currently serves as Clinical Associate Professor at the University of Arizona School of Medicine.

Yoshinori Abe, MD

Yoshinori Abe, MD (Internal Medicine)

Dr. Abe graduated from The University of Tokyo School of Medicine in 2015. He completed his residency at the Tokyo Metropolitan Health and Longevity Medical Center. He co-founded Ubie, Inc. in May 2017, where he currently serves as CEO & product owner at Ubie. Since December 2019, he has been a member of the Special Committee for Activation of Research in Emergency AI of the Japanese Association for Acute Medicine. | | Dr. Abe has been elected in the 2020 Forbes 30 Under 30 Asia Healthcare & Science category.

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