Are you not able to pay proper attention? Are you experiencing trouble in small things like organizing or managing your tasks? Do you experience a sudden change in your behavior like aggressiveness, excitability, fidgeting, hyperactivity, impulsivity, irritability, lack of restraint, absence of mind, etc.? Well, this missed management relates to ADHD which is Attention-deficit/hyperactivity disorder. You will find out all ADHD symptoms.