Do you find it hard to sleep  off? Popping sleeping pills may not work for long. You may wonder why it is so difficult to get the shut eye at night. Sleep requires a shift from sympathetic to parasympathetic part of the nervous system. When this transition does not happen, you get insomnia. Why do you need to sleep at all? During sleep, growth hormones get hiked and stress hormones get minimised. This enhances your immunity. In the absence of sleep, your immune system goes haywire and you may get depression or inflammation. Learn how to induce sleep, visit Quick tip: Drink warm milk with honey at bed time for sound sleep.