Tell me about the experience of breathing through your mouth?

I have rhinitis in my nose. I have been breathing loudly since I was a child. I don't know myself, but people around me will remind me. For example, when I watch TV and my mother, I will be scolded for breathing so much. For example, when I am watching my deskmate's lecture, I will say, "Your breathing is so loud." What happened to your nose? For example, when I went to the library with my roommate in college, my roommate stopped me! Be quiet! Then I was scolded by my mother since I was a child, and I began to know that I was breathing loudly, which was different from others. When I am with others, I will breathe through my mouth more deliberately. Sometimes I forget to breathe through my mouth, and people will hear me right away. Sometimes I am used to breathing with my mouth when no one is around.