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This information is provided by an independent source. Merck & Co., Inc. is not responsible for this content. The information provided on these various health topics is not intended to be a substitute for professional medical advice. You should always contact your health or medical practitioner to get the most accurate information about your condition. This information should not be used to make a diagnosis. Please discuss any and all treatment options with your healthcare professional.

Understanding ADHD - When a Child Has Attention Deficit Hyperactivity Disorder

Common Symptoms

Each person with ADHD has his or her own mix of traits. In most cases, some traits common to ADHD appear before age 7. And most traits linked with ADHD occur in more than one setting, such as both at home and in school.


Which of the following describe your child?

A partial list of symptoms common to attention deficit and hyperactivity disorder appears below. Your child may show traits from one or both groups.

Attention Deficit

  • Lacks mental focus

  • Performs inconsistently

  • Is distracted easily

  • Has trouble shifting between tasks or settings

  • Is messy, or loses things

  • Forgets

Hyperactive/Impulsive

  • Has trouble controlling impulses; might talk too much, interrupt, or have a hard time taking turns

  • Is easy to upset or anger

  • Is always moving (sometimes without purpose)

  • Does not learn from mistakes
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"Many kids have these traits. But in kids with ADHD, the traits are extreme and cause problems."


Remember Your Child's Strengths

Children with ADHD can be challenging to raise. Because of this, it's easy to overlook their good traits. What's special about your child? Do your best to value and support your child's unique talents, strengths, and interests.



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This information is not intended as a substitute for professional medical care.
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