As evidenced by my undergraduate transcript, my performance after the first two years of my five-year college career sharply improved. During my senior year of high school, I was hospitalized for an extended time following the manifestation of serious physical health issues that persisted throughout my initial few years of college. It is no coincidence that the upward trend in my grades correlates directly with the diagnosis and treatment of these issues. In consideration of my application, I urge you to regard the final three years of my undergraduate studies as indicative of future performance.
Hopefully it's concise enough and the "urge" bit doesn't sound dbaggy. I didn't address exactly what my illness was because tbh I neither want to talk about it nor do I think it's smart to dwell on something that's no longer really a factor. My grades go from F-C to straight As. If you think I should go more in detail or just not submit, tell me.