I'm going to yell at my friend for teasing me.
How does your friend tease you? Is your friend crossing the line?
He often makes fun of my face.
I can see why you would be upset at him for teasing you, but yelling won't make things better. Yelling will just cause tension between you two and make him angry at you. Instead, talk to him and tell him that his teasing hurts you.
Okay, I will tell my friend that.
If he's a good friend. That person will listen and stop.