 Some ADHD symptoms in adults differ from those seen in children . While children with ADHD may climb and run about excessively , adults may experience an inability to relax , or they talk excessively in social situations . Adults with ADHD may start relationships impulsively , display sensation @-@ seeking behavior , and be short @-@ tempered . Addictive behavior such as substance abuse and gambling are common . The DSM @-@ IV criteria have been criticized for not being appropriate for adults ; those who present differently may lead to the claim that they outgrew the diagnosis . 
