8 Signs Of A Tired (Fatigued) Kid, Causes & Treatment

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Excessive physical activity or lack of sleep can cause fatigue in children. However, overly tired kids who do not seem to recover with rest could have underlying health conditions.

Children are naturally energetic and eager to try new things and explore the world. Therefore, if they constantly remain exhausted and dull or lack enthusiasm, it could indicate chronic fatigue syndrome, which affects up to 2 in 1,000 children, as per a CDC report.

This post will help you understand the various causes, risks, complications, and treatment options for fatigue in children.

In This Article

Symptoms Of Fatigue In Children

It can be challenging to identify symptoms of sudden extreme fatigue in child as most of them may seem subtle before they become intense and may differ from those that usually show up in adults. Here are a few common signs of fatigue in children (1) (2).

  1. Sluggish or lethargic and an inability to get out of bed and participate in daily activities.
  1. Sleep issues – The child will either have trouble falling or staying asleep or feel weak even after sleeping.
  1. Post-exertional malaise (PEM), where the symptoms worsen after minor physical or mental exertion. It usually starts 12 to 48 hours post the activity and might last for days or even weeks.
  1. Dizzy feeling after standing for long hours of sitting in an upright position or feeling snoozy and dozy most of the time.
Tired kids may feel dizzy after standing for long hours

Image: Shutterstock

  1. Droopy shoulders
  1. Cognitive difficultiesiXDifficulty in memorizing, learning new information, concentrating, and decision making. and memory problems
  1. Recurrent headaches and sore throat
  1. Pains in the joints, body, and muscles
  1. Poor performance in academics and extracurricular activities.

If you notice any of these symptoms in your child, it is important to know the cause. Although external factors trigger fatigue in most cases, sometimes, it can be due to a medical condition. Either way, it is important to get to the root of the cause. Read the next section to know about some of the possible causes of fatigue in children.

Causes Of Fatigue In Children

Here are some of the possible causes of chronic fatigue in children.

1. Overstimulation

This is the most common reason for fatigue in children. If your child has indulged in excess physical activity, they might appear tired and fatigued for a few days. Sometimes, a stressful and long day spent at school may also cause fatigue in children and make them feel sapped of energy. This is common and may resolve on its own. Fatigue due to overstimulation is often characterized by fuzziness, clumsiness, lethargy, sleepiness, and irritation.

The possibility of over-stimulation from screen time contributing to tiredness in children is worth considering. In 2020, the prevalence of fatigue was higher among 12 to 17-year-olds at 10.9%. Of these adolescents, 12% reported tiredness with over two hours of screen time each day, while 6.5% felt tired with two hours or less.

Percentage of tiredness in children and teens based on their screen time

Source: Percentage of Children and Adolescents Aged 5–17 Years Who Reported Being Tired Most Days or Every Day; Centers for Disease Control and Prevention

Fatigue due to overstimulation is often characterized by fuzziness, clumsiness, lethargy, sleepiness, and irritation.

2. Dehydration

Dehydration may cause fatigue in children

Image: IStock

About 60% of the body is made up of water, and it is one of the important components required for the smooth functioning of the body. Water is also the major constituent of every cell and helps transport oxygen, nutrients, and waste products. Our body loses water when we breathe, sweat, and urinate. When the water level in our body gets depleted, it causes dehydration and the child feels enervated. Chronic dehydration can cause fatigue and dizziness in children.

If your child seems worn out or drained or complains about headaches, tiredness, and light-headedness, it could be due to dehydration (3).

3. Malnutrition

Deficiency in nutrients such as iron, B12, and vitamins may also result in fatigue in children and they may seem listless and weak. The leading causes of malnutrition are poor diet, drug modalities, infections, etc. Besides fatigue, the other symptoms of malnutrition include weight loss, lethargy, loss of appetite, loss of hair, pale skin, and brittle nails.

It is important to identify the signs early on as malnutrition in children can cause severe consequences in the long-term (4).

4. Sleep disorders

Fatigue in children can also be caused by stress, airway restrictions, medications, and other medical conditions associated with sleep disorders such as juvenile rheumatoid arthritisiXPersistent joint pain, swellings, and stiffness in children. , asthma, obstructive sleep apneaiXA type of sleeping disorder caused by over-relaxation of muscles in the airway. , insomniaiXA sleep disorder that makes it difficult to fall asleep, stay asleep, or get a sound sleep. , restless leg syndromeiXA type of medical condition characterized by the irresistible urge to move the legs. , and anemia.


Poor sleep may make them feel sleepy or drowsy during the daytime, increase fatigue, cause absenteeism, and result in poor academic performance. If your child feels constant fatigue, check if it is due to lack of sleep (5).

5. Infectious mononucleosis (IM)

Fatigue is one of the main symptoms of infectious mononucleosis, which is caused by the Epstein-Barr virusiXA common type of human herpesvirus that weakens the immune system. (EBV). It belongs to the herpes family and is transmitted through saliva. IM often puts children at the risk of developing chronic fatigue syndrome and physical and cognitive problems (6).

6. Congenital heart diseases

Congenital heart diseases can make your kids tired

Image: Shutterstock

Children born with heart issues may exhibit chronic fatigue. One of the rare heart conditions seen in children is pediatric cardiomyopathy, which can lead to a weakened ability of the heart to pump blood, fatigue, heart block, and irregular heartbeats, shortness of breath, chest pain, swelling of legs, and episodes of fainting (7).

7. Depression

Depression in children and adolescents is often overlooked and taken for a typical teenager or child behavior. However, children are susceptible to depression just like adults. They may seem uninterested, indifferent, or apathetic toward others or any activity around them.

If the symptoms are left untreated, they might result in long-term consequences. Some common signs of depression include loss of interest, extreme fatigue, social withdrawal, concentration difficulties, loss of appetite, and sleep disorders (8).

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Health conditions such as hypothyroidism or certain medications, such as those used to treat allergies, may also cause drowsiness and fatigue in children (13).

8. Narcolepsy

It is an uncommon, chronic neurological disorder in children that affects their brain’s functioning to regulate sleep and wakefulness. The condition makes children too sleepy during the day, causes an inability to stay awake, and even causes sudden sleep attacks at any time of the day or activity. Although children as young as four to five years old exhibit the symptoms, it is usually a misdiagnosed or underdiagnosed condition in children and only diagnosed in adolescence or later in life.

These children get really tired frequently, especially during inactive times, like reading or sitting. Although preschoolers with this condition can take two to three hours of long afternoon naps, they become tired again within one to two hours. So, if your child looks forgetful, extremely tired, and takes long naps throughout the day, even after five or six years of age, consult a healthcare provider (9).

Risks And Complications Of Fatigue In Children

Children with symptoms of allergies, malnutrition, or underlying medical issues are at a higher risk of developing fatigue.

Fatigue causes not just physical problems but also mental and behavioral problems in children. The following are some of the complications of fatigue.

  • Decline in working memory
  • Impaired judgment
  • Increased susceptibility to infections
  • Slower growth
  • Deficiency in cognitive and problem-solving skills

Diagnosis Of Fatigue In Children

The doctor might do a physical examination to determine nutrition deficiency or anemia. They may also ask you questions about your child’s medical history, medications taken, and allergies. If needed, blood and urine tests might be prescribed.

protip_icon Things to know
The healthcare provider may also use imaging tools such as x-rays or MRIiXA medical imaging method that generates 3D images of the body's tissues using radio waves, magnetic field, and a computer. to look for any underlying pathology causing fatigue in children (12).

Treatment For Fatigue In Children

Fatigue in children can be treated once the underlying cause is addressed. Here are some common treatment options for fatigue in children.

  1. If your child has had excess physical activity during the day, encourage them to take adequate rest for a couple of days.
Encourage adequate rest in tired kids after execessive physical activity

Image: Shutterstock

  1. If the school projects are making them tired, give them time during the weekends to do things they enjoy.
  1. The World Health Organization (WHO) recommends these water intake levels for children (10).
AgeGenderWater requirement/day
4–8 yearsBoys and girls1.7L
9–13 yearsBoys2.4L
14–18 yearsBoys3.3L

Make sure your child stays hydrated throughout the day. Keep track of their water consumption and remind them to have water. You may also give them fruit juices to keep them hydrated. Increase the quantity on days when your child takes part in sports or strenuous activities.

  1. If your child is diagnosed with anemia or malnutrition, make sure you include fresh fruits, vegetables, healthy fats, and proteins in their diet. Take your doctor’s help to understand your child’s nutritional requirements and design a diet plan that is apt for their age.
  1. Establish a sleeping routine to help your child overcome any sleep disorders. Make sure your child does not use gadgets at least two hours before bedtime, and ensure they have their meals two hours before bedtime. You may also instruct them to take a bath before going to bed. All these activities would help them relax and sleep better.
A sleeping routine can help your kids overcome any sleep disorders

Image: IStock

  1. If your child suffers from any infections, follow your doctor’s advice. You may also make them take adequate rest, eat a healthy diet, and drink plenty of fluids.
  1. Make sure your child spends some time under the sun playing or engaging in some physical activity as this would help their bodies to absorb vitamin D.
  1. In the case of chronic conditions, your doctor may prescribe physiotherapy, which might help lessen fatigue.
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Regular exercising, managing stress, and practicing good sleep habits can help children reduce fatigue (11).

Frequently Asked Questions

1. Which illnesses cause extreme fatigue?

Fatigue in children could be due to several reasons. Some common reasons are chronic fatigue syndrome, deficiencies, heart or lung issues, eating disorders, hormonal imbalances, or emotional stress. Chronic health conditions such as cancer, multiple sclerosisiXA type of disorder in which the immune system attacks the central nervous system. , and autoimmune diseasesiXConditions in which the body’s immune system mistakes healthy cells as foreign and attacks them. may also cause extreme fatigue (11).

2. Are hyperactive kids tired?

Hyperactivity or ADHDiXA neurodevelopmental disorder in children affecting their ability to pay attention, control impulses, and making them hyperactive. could cause tiredness in children. A study by the National Library of Medicine on 147 children diagnosed with ADHD-1 concluded that 14% of children obtained less sleep while 31% had delayed onset of sleep. However, more studies are needed to determine if hyperactivity causes extreme fatigue in children (12).

3.Are there any long-term effects of fatigue in children?

Fatigue in children often does not have any long term effects and is very treatable. When you notice that your child is tired more than usual, contact a medical health practitioner immediately as it is the fastest way to diagnose any underlying health issues and treat them.

Tired kids may be unable to get out of bed and do regular activities. Sleep issues, malnutrition, overstimulation, depression, heart diseases, and certain infections can cause fatigue or tiredness in children. They may experience physical and emotional signs and symptoms based on the underlying cause. A detailed physical examination, blood tests, and imaging tests help diagnose the causes. The treatment may vary depending on the cause, including psychotherapies, medications, supplements, or surgery. Timely treatment could prevent complications and improve quality of life.

Infographic: Effective Ways To Deal With Fatigue In Children

Children may frequently feel tired due to their active lifestyles, academic demands, and changing bodies. However, managing tiredness in children is important for their overall health and development. Check out the infographic below for some simple and practical suggestions to manage tiredness or fatigue in children.

how to manage fatigue in children (infographic)

Illustration: Momjunction Design Team

Get high-quality PDF version by clicking below.

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Download Infographic in PDF version

Key Pointers

  • Children may sometimes have sleep problems, lethargy, etc., due to excess play or overstimulation.
  • However, if they are tired and cannot get out of bed to participate in routine activities, they might have chronic fatigue syndrome.
  • Dehydration, nutritional deficiency, infections, and cardiological and neurological disorders are some reasons for children’s fatigue.
  • Consult your child’s doctor, who could interpret the cause and help manage this condition.


MomJunction's articles are written after analyzing the research works of expert authors and institutions. Our references consist of resources established by authorities in their respective fields. You can learn more about the authenticity of the information we present in our editorial policy.

1. Treating the Most Disruptive Symptoms First and Preventing Worsening of Symptoms; Chronic Fatigue Syndrome; Centers for Disease Control and Prevention
2. Leonard A. Jason, Kristen Barker, and Abigail Brown; Pediatric Myalgic Encephalomyelitis/Chronic Fatigue Syndrome; HHS Author Manuscripts (2012).
3. David Benton; Dehydration Influences Mood and Cognition: A Plausible Hypothesis?; Nutrients (2011).
4. Alamgir Khan et al.; Causes, sign, and symptoms of malnutrition among the children; Journal of Nutrition and Human Health (2017).
5. Amy S. Lewandowski et al.; Sleep Problems in Children and Adolescents with Common Medical Conditions; HHS Author Manuscripts (2011).
6. Leonard A. Jason et al.; Predictors of post-infectious chronic fatigue syndrome in adolescents; Health Psychology and Behavioral Medicine (2014).
7. Pediatric Cardiomyopathy; National Organization for Rare Diseases
8. Childhood Depression; Anxiety & Depression Association of America
9. Narcolepsy in Children; Cleveland Clinic
10. Nutrients in Drinking Water; World Health Organization
11. Fatigue; Cleveland Clinic.
12. Stephen B. Becker et al.; Sleep Habits in Children with Attention-Deficit/Hyperactivity Disorder Predominantly Inattentive Type and Associations with Comorbid Psychopathology Symptoms; National Library of Medicine
13. A tired child? What you should know; Harvard Medical School

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