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Children often complain of being tired. Usually it’s for simple reasons — because it’s the end of a busy day, or because they stayed up late the night before, or because they are trying to get out of doing something they don’t want to do. When kids are sick they are usually tired, and need more rest to get better. But when a child complains all the time, and fatigue starts to get in the way of things they usually enjoy, it could be a sign of a problem.

Here are some possible reasons for chronic fatigue in children:

  • Sleep problems. This makes sense, obviously, since if a child doesn’t get enough sleep, or good enough sleep, they will be tired. There are lots of ways this can happen, such as:
    • Staying up later than they should for homework or whatever reason. Children need at least 8 to 10 hours of sleep a night; if they are getting less, it catches up with them
    • Waking up frequently during the night, whether it’s because they are a light sleeper or because of a sleep disorder
    • Sleep apnea, or pauses in breathing that happen during sleep. The most common cause is enlarged tonsils or adenoids, but there are other causes as well.
  • Side effects of medications. Many medications can cause sleepiness, including common allergy medications.
  • Infections, such as Epstein-Barr virus. There are some infections that can make children very tired, and some of them can last for weeks or months.
  • Chronic illnesses, such as asthma. When chronic illnesses are in poor control, they can cause fatigue. The reason for the fatigue depends on the illness. For example, children with poorly controlled asthma can feel frequent shortness of breath, which makes them feel tired. For some illnesses, feeling tired may be the first clue something is wrong.
  • Anemia. The red cells in the blood carry oxygen to the cells in the body. When there aren’t enough of them, it causes fatigue.
  • Hypothyroidism. When the thyroid gland doesn’t produce enough thyroid hormone, the metabolism of the body can slow down and make the person feel tired.
  • Heart problems. This is very rare in children, but if the heart is weak, it can cause fatigue.
  • Cancer or other serious diseases. These too are very rare, but feeling tired can be one of the early symptoms.
  • Depression, anxiety, or other mental health problems. When life feels hard for children, for whatever reason, they may feel it and express it as fatigue. This is much more common than many of the medical reasons listed above.

Just as adults can have chronic fatigue without any clear medical reasons, children can as well. Children can feel so tired that they have trouble with normal activities such as school, sports, or playing with friends.

What to do if you have a tired child

If your child is complaining of feeling tired all the time for more than a week or two, you should make an appointment with your doctor so that the doctor can:

  • Take a very careful history of the fatigue and any associated symptoms, and ask questions about everything going on in your child’s life, including sleep habits and anything that could be causing stress or anxiety
  • Do a thorough physical examination, looking at your child’s weight and growth and looking for any physical abnormalities
  • Do any tests that might be needed. Testing would depend on your child’s symptoms and physical examination, and could include blood tests, urine tests. or imaging such as x-rays or MRIs
  • Decide if a visit with a psychologist or other mental health professional would be helpful.

Most of the time the reason for chronic fatigue in children is nothing serious — and very treatable. So instead of worrying, or spending time on Google, call your doctor’s office and make an appointment. It’s the fastest way to figure out what’s going on, and get your child back to feeling well.

The post A tired child? What you should know appeared first on Harvard Health Blog.

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