You dream that your face is swollen and your whole body is slightly ulcerated, which shows that you are subconsciously concerned about your appearance.
I may fall in love recently, making the subconscious things stronger. There is nothing to be afraid of. The worse your dreams are, the better your reality is. Dreaming like this may be the reason why you are a little nervous. Don't think too much, seize the opportunity, don't worry, be confident.
Perhaps what scares you is the very clear and strange atmosphere in the dream. It's okay. Most people's dreams are so atmospheric and depressing.