The first thing to check is whether the sleep habits are bad, such as some people do not sleep enough at night or irregular sleep time, in addition to some sleep disorders can cause total sleepiness, want to sleep, such as some people in the sleep of a short period of respiratory arrest, we call sleep apnea, can appear total sleepiness, want to sleep, in addition to some like episodes of sleeping sickness, very sleepy during the day, some Sometimes, people suddenly fall asleep in the middle of normal activities, because some people have long-term insomnia, difficulty falling asleep or waking up early, which can also cause sleepiness without obvious reasons, sleepiness and wanting to sleep. If the body has certain diseases, such as hypothyroidism, because the thyroid gland can not synthesize the thyroid hormone needed by the body, there are often symptoms of low metabolism, frequent sleepiness and sleepiness, while some people have long-term depression, anxiety, sadness, frustration can also affect the daily work and ordinary affairs, can also appear always want to sleepy, want to sleep. At the same time, there are some factors that affect sleep and even sleep quality, such as serious noise or have their own health problems, such as restless legs syndrome or long-term, repeated, severe cramps at night, and even some people often work at night or change time zones, can cause total sleepiness, want to sleep. It is possible for certain medications to cause total sleepiness and sleepiness after taking them. If the symptoms last longer and affect the quality of life, we should go to the hospital and let the doctor examine us in detail to find the cause and help treat it. To do is a healthy lifestyle, reasonable and balanced nutrition, scientific and moderate exercise, regular work and rest, adequate sleep, quit smoking, limit alcohol, and psychological balance is most important.