ADHD is one of the most common neurodevelopmental disorders of childhood. It is usually first diagnosed in childhood and often lasts into adulthood. Some people with ADHD have fewer symptoms as they age, but some adults continue to have major symptoms that interfere with daily functioning. Adult ADHD symptoms may include: Impulsiveness, problems prioritizing, Poor time management skills,  trouble multitasking, poor planning, Frequent mood swings,  problems followingt and completing tasks, etc.