Some children with ADHD also have other illnesses or conditions. For example, they may have one or more of the following:
- A learning disability. A child in preschool with a learning disability may have difficulty understanding certain sounds or words or have problems expressing himself or herself in words. A school-aged child may struggle with reading, spelling, writing, and math.
- Oppositional defiant disorder. Kids with this condition, in which a child is overly stubborn or rebellious, often argue with adults and refuse to obey rules.
- Conduct disorder. This condition includes behaviors in which the child may lie, steal, fight, or bully others. He or she may destroy property, break into homes, or carry or use weapons. These children or teens are also at a higher risk of using illegal substances. Kids with conduct disorder are at risk of getting into trouble at school or with the police.
- Anxiety and depression. Treating ADHD may help to decrease anxiety or some forms of depression.
- Bipolar disorder. Some children with ADHD may also have this condition in which extreme mood swings go from mania (an extremely high elevated mood) to depression in short periods of time.
- Tourette syndrome. Very few children have this brain disorder, but among those who do, many also have ADHD. Some people with Tourette syndrome have nervous tics and repetitive mannerisms, such as eye blinks, facial twitches, or grimacing. Others clear their throats, snort, or sniff frequently, or bark out words inappropriately. These behaviors can be controlled with medication.
ADHD also may coexist with a sleep disorder, bed-wetting, substance abuse, or other disorders or illnesses.
Provided by NIMH