But changes in the body clock aren’t the only reason teens lose sleep.Lost of people have insomnia(失眠).The most common cause of insomnia is stress.But all sorts of things can lead to insomnia.These include physical discomfort,emotional troubles and even sleeping environment.It’s common for everyone to have insomnia from time to time.But if it lasts for a month or more,go and see a doctor.
Some people have a condition that causes stomach acid(酸) to move backward towards the chest.This produces the uncomfortable,burning feeling called heartburn.So even if the person doesn’t notice the feelings of heartburn because he is sleeping,he may feel tired the next day.
Most teens have nightmares sometimes.But,if they are frequent,a person’s sleep pattern can be seriously affected.The most common cause of nightmares is emotional problems,such as stress(压力) or anxiety.If you have them a lot,it’s a good idea to talk to a doctor.
Doctors encourage teens to make lifestyle changes to develop good sleeping habits.You probably know that coffee can keep you awake,but did you know that playing video games or watching TV does the same?
1.The main idea of the first paragraph is
.
A.teenager can’t get enough sleep at all
B.sleeping problems have different causes
C.yawning is a good way to get rid of sleep
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