Lethargic
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Reviewed By:
Unnati Patel, MD, MSc (GP / Family doctor)
Dr Patel graduated from the Zhejiang University School of Medicine. She worked in clinical research at the University of Illinois in Chicago and University of Nevada in Las Vegas focused on culturally adapted health interventions for preventive medicine in the community setting. Received her Master's of Science in Global Health (concentration in Health Policy) from Georgetown University, during which she worked with the WHO in Sierra Leone and Save the Children in Washington, D.C. Unnati went on to complete her family medicine residency in Chicago, Illinois at Norwegian American Hospital. | | She is currently working as a primary care physician in the city of Chicago and completing her Master's of Business Administration at the Northwestern University Kellogg School of Management and Fellowship in Leadership in Value-Based Care.
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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People with these 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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Content updated on Jan 4, 2023
About the symptom
It describes an overall feeling of tiredness or lack of energy. People who have fatigue 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
- Diabetes mellitus (DM)
A disease where blood sugar levels are abnormally high, due to problems with insulin production or resistance. There are often no symptoms until the condition has worsened, hence regular screening is important.
- Cirrhosis of the liver
A condition where normal liver is permanently damaged and replaced with scar issue. There are many different causes including infections, alcohol abuse and diabetes.
- 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.
- Leg cramps
- Common cold (upper respiratory tract infection)
- Diabetic neuropathy
Related serious diseases
- Uremia / chronic renal failure
Severe decrease in kidney function. There are many causes of this, from repeated damage due to infections, diabetes, high blood pressure to autoimmunity (body's immune system attacking itself).
- Heatstroke
- Pneumonia (lower respiratory tract infection)
- Right heart failure
Questions your doctor may ask about this symptom
Your doctor may ask these questions to check for this symptom
Do you feel fatigued?
Do you get tired easily?
Do your symptoms of feeling tired and unwell get better or worse throughout the day?
Do you feel more fatigued in the morning?
Do you feel more fatigued and unable to move your muscles in the evenings compared to the mornings?
Other Related Symptoms
Similar symptoms or complaints
Symptoms from the same body system / part
Reviewed By:
Unnati Patel, MD, MSc (GP / Family doctor)
Dr Patel graduated from the Zhejiang University School of Medicine. She worked in clinical research at the University of Illinois in Chicago and University of Nevada in Las Vegas focused on culturally adapted health interventions for preventive medicine in the community setting. Received her Master's of Science in Global Health (concentration in Health Policy) from Georgetown University, during which she worked with the WHO in Sierra Leone and Save the Children in Washington, D.C. Unnati went on to complete her family medicine residency in Chicago, Illinois at Norwegian American Hospital. | | She is currently working as a primary care physician in the city of Chicago and completing her Master's of Business Administration at the Northwestern University Kellogg School of Management and Fellowship in Leadership in Value-Based Care.
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.
Just 3 minutes.
Developed by doctors.
Ubie is supervised by 50+ medical experts worldwide
Seiji Kanazawa, MD, PHD
Obstetrics and gynecology (OBGYN)
National Center for Child Health and Development, Japan