What are the common symptoms of ADHD?

Patient's question:

Adolescent ADHD Common Symptoms and Manifestations
Children are currently in a critical growth phase, but recently it has been observed that they are always unable to concentrate on their studies. The teacher suggests it might be ADHD. What are the common symptoms and manifestations of adolescent ADHD?

Doctor's answer:

Hello! The common manifestations of ADHD are divided into three aspects:
Excessive activity: The child in the mother's womb shows significantly more activity than other (peers), infants, and preschoolers. This is especially evident in hyperactivity, crying, restlessness, and difficulty calming down to meet requirements. As the child grows older, the level of activity increases, and they struggle to concentrate in class or focus on work.
Impulsivity, emotional instability: Children with excessive activity often have poor self-control, unstable emotions, mood swings, stubborn personalities, immaturity, a lack of sense of honor, and confusion about right and wrong. They may lie, deceive, skip school, and sometimes develop habits outside.