Fats and oils are needed for your brain and nervous system, for energy production and for making most of the body s vital hormones. Children, in particular, absolutely require adequate fats and oils, particularly EPA and DHA. These are two omega-3 essential fatty acids needed for development of the nervous system.
Not washing your face before you go to sleep can cause breakouts on your forehead since makeup residue has a chance to slip inside your pores, says Bay Area dermatologist Katie Rodan in Allure. Rodan explains that your face heats up while you sleep, making it easier for anything on your face to penetrate your pores.
It's the fact that with hair across the forehead, you will perspire more there which will make the forehead more oily. It will also cause you to put your hand up there to brush the bangs out of your eyes or push them aside. Your hand carries the most bacteria to all parts of your body. And if you let your hair get oily, that will add to the mix.