Symptoms of ADHD fall under the categories of inattention, hyperactivity and impulsivity, explains PsychCentral. Frequent careless mistakes, easy distractibility and difficulty staying organized are examples of inattention symptoms. Hyperactivity may manifest as a tendency to talk excessively or frequent fidgeting, while frequently interrupting others is an example of impulsivity.
Children with attention deficit hyperactivity disorder may often appear as though they are not listening when others speak directly to them, or they may avoid or express a distaste for activities that require sustained mental engagement, such as homework, notes PsychCentral. They may lose things more often than other children and have a tendency to be forgetful, even when it comes to things that are part of their regular routines. Another indicator is failure to complete chores or follow instructions that is not related to intentional disobedience.
In children, the hyperactivity component of ADHD may present as a tendency to climb or run around at inappropriate times, while teenage and adult ADHD sufferers often report feeling generally restless, states PsychCentral. Discomfort when attempting to engage in quiet leisurely activities is another potential manifestation of hyperactivity.
ADHD is typically considered a psychiatric disorder that begins in childhood, according to PsychCentral. The fourth edition of the Diagnostic and Statistical Manual of Mental Disorders required symptom development before the age of 7 for a diagnosis. However, the generally accepted cut-off age for symptom development became 12 with the release of the DSM-5.