He is facing many difficulties due to gender identity disorder.

Education about sex is very important.

Gender identity refers to the gender that each individual recognizes themselves as.

Could you show me your passport to confirm your identity?

He was diagnosed with bipolar disorder.

He is receiving treatment for obsessive-compulsive disorder.

His nature is very kind.

Detailed information is needed to understand the nature of that project.

I was moved by his sincerity.

His nature is very kind.