由不良需要或开始主要是由好奇、试探等幼稚的心理引起，有的是由于遭受挫折产生的不良情绪引起的有某种身心障碍的儿童。主要症状有病态恐怖、攻击行为、多动症、孤独症等problem child; problem children(plural)

• 问题儿童长大后往往会成为有问题的大人。

  Problem children often grow up to be problem adults.

• 因为亲情缺失，许多农村留守儿童正在成为“问题儿童”。

  Because of a lack of family love, many children left behind to be looked after in the countryside are becoming "problem children"