Sorry that the link was clipped somehow…here is the short article from the American Psychiatric Assoc. " What Is Gender Dysphoria?
Gender dysphoria involves a conflict between a person’s physical or assigned gender and the gender with which he/she/they identify. People with gender dysphoria may be very uncomfortable with the gender they were assigned, sometimes described as being uncomfortable with their body (particularly developments during puberty) or being uncomfortable with the expected roles of their assigned gender.
People with gender dysphoria may often experience significant distress and/or problems functioning associated with this conflict between the way they feel and think of themselves (referred to as experienced or expressed gender) and their physical or assigned gender.
The gender conflict affects people in different ways. It can change the way a person wants to express their gender and can influence behavior, dress and self-image. Some people may cross-dress, some may want to socially transition, others may want to medically transition with sex-change surgery and/or hormone treatment. Socially transitioning primarily involves transitioning into the affirmed gender’s pronouns and bathrooms.
People with gender dysphoria may allow themselves to express their true selves and may openly want to be affirmed in their gender identity. They may use clothes and hairstyles and adopt a new first name of their experienced gender. Similarly children with gender dysphoria may express the wish to be of the opposite gender and may assert they are (or will grow up to be) of the opposite gender. They prefer, or demand, clothing, hairstyles and to be called a name of the opposite gender. (Medical transition is only relevant at and after the onset of puberty.)
Gender dysphoria is not the same as gender nonconformity, which refers to behaviors not matching the gender norms or stereotypes of the gender assigned at birth. Examples of gender nonconformity (also referred to as gender expansiveness or gender creativity) include girls behaving and dressing in ways more socially expected of boys or occasional cross-dressing in adult men. Gender nonconformity is not a mental disorder. Gender dysphoria is also not the same being gay/lesbian.
While some children express feelings and behaviors relating to gender dysphoria at 4 years old or younger, many may not express feelings and behaviors until puberty or much later. For some children, when they experience puberty, they suddenly find themselves unable to identify with their own body. Some adolescents become unable to shower or wear a bathing suit and/or undertake self-harm behaviors.