Your question is not stupid. I understand. You can't help what grows on your face. The blemish makes you feel self conscious. Of course you feel the urge to cover up. It could be very interesting test to see whether you are accepted for who you are, when you show up with your blemish. If you go in with a story and bandage, it may possibly not feel as honest as if you go in as your real self. It could be a symbol of showing your T all your flaws and still be accepted unconditionally. I have a chronic glaring skin disease all over my face, and my therapist accepts me completely. I feel I can be as ugly as I want and she will still love me. No matter what you decide I hope your session goes well.