Skin condition; are most conditions hard to cure?

I have the most sensitive skin that you could possibly imagine. I see a dermatologist often and they always have the solution. Are you properly hydrated? Drinking a lot of water really helps with my dry skin (when I was younger it peeled and flaked) and the doc also gave me this stuff that is similar to vaseline but is medicated. You can also try taking Vitamin E supplements (only twice a week though) to help improve your skin.