Beware cover your head while sleeping there is usually a serious do it a lot of people do not know what damage this habit wrong which cover the head during sleep, the head covered during sleep completely (whether cover mattress or padding) bad habit and dangerous because it increases the concentration of carbon dioxide and a fewthe proportion of oxygen in the space to breathe and this will be like smoking and lead to disaster involving brain cells and may lead to damage to brain cells and Dmorha and stop their growth .... And thus the loss of the brain the ability to carry out its functions effectively and efficiently.