We have all heard the advice that you have to cut your hair if you want it to grow. So you ask yourself: Does my scalp know when I need a haircut ...healthy hair grows to be longer hair. Just like dry skin cracks dry hair splits so dry ends become infamous split ends. They don’t look good but for many they think I don’t care because the length is more important. While split ends are ugly they also snap off causing an unwanted and an unintentional “haircut” ...