Sleep can be divided into four periods, light sleep, light sleep, mid-sleep and deep sleep, light sleep and light sleep is not very effective in relieving fatigue, so light sleep, easy to wake up will affect the quality of sleep, resulting in fatigue, headache and dizziness and other symptoms. Easy to wake up may be irregular work and rest, caused by staying up late, or a lack of calcium leads to easy to wake up, nervousness, stress can also lead to wake up, but also and eat too much before going to bed, drink strong tea, coffee has a relationship, or engaged in strenuous exercise caused by.