When we do not ensure sufficient sleep at night, we may be sleepy during the daytime study or life. You can stimulate the sensory nerves, drink tea as well as coffee, open windows and ventilation to make people immediately awake and not sleepy: 1, stimulate the sensory nerves: when feeling sleepy, you can use some methods to stimulate the sensory nerves to refresh, such as washing your face with cold water, using cool oil applied to the temples, wind pool points, people and so on, this method can make people awake for a short time, you can also chew mint chewing gum to stimulate the nerves, refresh the brain; 2 The tea and coffee: tea is rich in theophylline can stimulate the central nervous system of the brain, can play a refreshing effect; coffee contains caffeine, after intake can stimulate the nerves, refreshing; 3, open the window ventilation: indoor closed for a long time, it will cause the air in the carbon dioxide concentration increased, sleepy, at this time open the window ventilation, disperse the indoor carbon dioxide, breathe fresh air, can also refresh 4, exercise: sleepy when you can do some simple exercises, such as standing, walking, stretching legs, arms, etc., which can accelerate blood circulation, the brain can also wake up. In addition, usually we should ensure regular rest, early to bed and early to rise, adults sleep 7-9 hours a day, if possible, you can nap for half an hour at noon, so that the day can be energetic.