Lack of sleep or stay up for a long time will be very dangerous .  It will trigger a lot of serious problems to your body . Hope you could read below danger caused by lacking of sleep . Make sure you have enough sleep time . Danger 1: Lead to depression Over time, lack of sleep and sleep disorders can lead to the generation of depression. Insomnia and depression are inextricably linked. According to a 2007 survey of 10,000 people, those who suffer from insomnia are more likely to develop depression than those who do not have insomnia. In fact, insomnia is often one of the aura of depression. Insomnia and depression are complementary, lack of sleep will increase the status of depression, and [...]