Final answer:
Gender Dysphoria in children is diagnosed according to the DSM-5 when there is a marked difference between the child's experienced/expressed gender and the gender assigned to them, persisting for at least six months and causing significant distress. A strong desire to be of another gender must be verbalized by the child.
Step-by-step explanation:
The diagnostic criteria for Gender Dysphoria in children according to the DSM-5 involve a marked incongruence between one's experienced/expressed gender and the gender others would assign him or her, which must persist for at least six months. Additionally, in children, there must be a strong desire to be of another gender that is verbalized. The condition must also cause significant distress or impairment in social, school, or other important areas of functioning. It is essential to understand that not all transgender people experience gender dysphoria. Medical professionals emphasize that having a diagnostic category helps support those who require assistance or treatment.