Please note: This information was current at the time of publication. But medical information is always changing, and some information given here may be out of date. For regularly updated information on a variety of health topics, please visit, the AAFP patient education website.

Information from Your Family Doctor

Failure to Thrive: What You Should Know


Am Fam Physician. 2016 Aug 15;94(4):online.

  See related article on failure to thrive

What is failure to thrive?

Failure to thrive is used to describe children who weigh a lot less or who are growing much more slowly than most others their age. It is also called weight faltering. Sometimes, children with failure to thrive do not gain enough weight for normal healthy development. A doctor can tell if your child has failure to thrive by looking at weight and height measured over time.

What causes it?

Failure to thrive happens when a child doesn't get enough calories to grow normally. This can be caused by a medical problem, breastfeeding problems, or the child not eating well. Failure to thrive can happen any time during childhood. It is more likely during times of change, like when the child switches from breast milk or formula to table foods, or when there is a change in routine or child care plans.

How is it treated?

Your child's doctor will ask general questions about your child's health and eating habits, examine your child, and look at growth charts. Growth charts map out how your child has grown over time. From this information, he or she can give you a plan to use at home to help your child get more nutritious calories to gain weight. The treatment plan will include follow-up doctor's visits to check on your child's progress. The doctor can also give you information about programs in your community that can help you.

Most children will improve using the treatment plan. If your child doesn't gain weight, the doctor may do lab tests to see what is keeping your child from growing. A hospital stay is usually not needed.

Once failure to thrive is treated, your child can have normal check-ups. The doctor will keep track of your child's growth and developmental milestones at each visit. Be sure to tell the doctor any time you are worried about your child's progress.

This handout is provided to you by your family doctor and the American Academy of Family Physicians. Other health-related information is available from the AAFP online at

This information provides a general overview and may not apply to everyone. Talk to your family doctor to find out if this information applies to you and to get more information on this subject.


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Mar 1, 2020

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