Think about the admissions committee meeting. Your app comes up for discussion, and the person speaking for it says, “yes… this is the kid who overcome eczema”. I think your struggles have been real, and this topic is important to you. However, the goal of the essay is to both reveal something more personal about yourself, and also to make them want you on campus. You don’t have to take the topics literally, and most applicants have several aspects of themselves they can choose to present. I’d suggest you figure out something else interesting about yourself to write about, then figure out how to fit it into one of the prompts.