所以，你失眠是因為以下哪種原因？

Sleep difficulties are a common problem for millions of adults. Even if you can get to sleep, you might have trouble staying asleep. Does this sound familiar? You drift off to dreamland, but find yourself wide awake at 3 a.m., or maybe you wake up every few hours throughout the night. Adequate sleep is supposed to leave you feeling refreshed and ready to start your day. But if your sleep is interrupted, you’re likely to feel fatigued and sleepy the next day. So what gives? There are several factors that may interfere with getting your zzz’s including the following:

睡眠困難是數(shù)百萬成年人的普遍問題。即使你能入睡，你也可能難以保持睡眠。這聽起來熟悉嗎?你漸漸進入夢鄉(xiāng)，卻發(fā)現(xiàn)自己凌晨3點就完全醒了。或者你可能整晚每隔幾個小時就醒來一次。充足的睡眠會讓你感覺神清氣爽，為新的一天做好準備。但是如果你的睡眠被打斷，你可能會在第二天感到疲勞和困倦。那么到底是為什么呢?有幾個因素可能會影響你的睡眠，包括以下幾點:

1. Too much caffeine:

1. 過量的咖啡因:

You probably already know caffeine is a stimulant and can affect your ability to fall asleep. But it can also lead to poor quality sleep including waking up in the middle of the night. Caffeine has a three to five-hour half-life, which means it takes your body that many hours to get rid of half the caffeine you consumed. The bottom line is you may feel the effects of caffeine several hours after you consume it. Keep in mind, energy drinks, cola, chocolate and certain teas also contain caffeine. Your best bet is to avoid caffeine about six hours before bed.

你可能已經(jīng)知道咖啡因是一種興奮劑，會影響你入睡的能力。但它也會導致睡眠質量差，包括半夜醒來?？Х纫蛴腥轿鍌€小時的半衰期，這意味著你的身體需要那么多小時才能消耗掉一半的咖啡因。最重要的是，你可能在攝入咖啡因幾小時后就會感覺到它的效果。記住，能量飲料、可樂、巧克力和某些茶也含有咖啡因。你最好在睡前6小時內避免攝入咖啡因。

2. Stress:

2. 壓力:

Stress and lack of sleep seem to go hand in hand. If you’re stressed, it can be hard to sleep well and may lead to middle of the night insomnia. When you don’t get enough sleep, that can also lead to more stress and it becomes a vicious cycle. According to the American Psychological Association, adults who get less than eight hours of sleep each night report higher levels of stress symptoms than those who sleep longer. Although it can be easier said than done, it’s important to unwind and unplug before bed.

壓力和睡眠不足似乎是相伴而生的。如果你有壓力，就很難睡好覺，可能會導致半夜失眠。當你沒有足夠的睡眠，這也會導致更多的壓力，并成為一個惡性循環(huán)。據(jù)美國心理協(xié)會(American Psychological Association)稱，每晚睡眠不足8小時的成年人比睡眠時間較長的人更容易出現(xiàn)壓力癥狀。雖然說起來容易做起來難，但睡前放松和拔掉插頭是很重要的。

3. Sleep environment:

3.睡眠環(huán)境:

Your sleep environment can contribute to poor sleep. For example, loud noises can jolt you from a sound sleep or light peeking through the shades can wake you. Fortunately, there are ways to make your bedroom more sleep-friendly. Invest in a quality mattress and comfy bedding and consider keeping your bedroom cool, which most people find helps sleep. Make sure your curtains are heavy enough to block out sunlight and use a white noise machine or earplugs to block sounds from outside.

你的睡眠環(huán)境會導致睡眠質量下降。例如，巨大的噪音會把你從酣睡中驚醒，或者透過陰影窺視的光線會把你吵醒。幸運的是，有一些方法可以讓你的臥室更適合睡眠。購買優(yōu)質床墊和舒適的床上用品，考慮保持臥室涼爽，大多數(shù)人認為這有助于睡眠。確保你的窗簾足夠厚，可以阻擋陽光，使用白噪音機或耳塞來阻擋外面的聲音。

4. An aching back:

4. 背痛:

Back pain can disrupt sleep and leave you struggling to find a comfortable position. If you have chronic back pain, it’s important to treat the underlying cause. Also, your sleep position can make a big difference in your comfort level. The right position for you may depend on whether your upper or lower back ache. To take the pressure off your back, the Mayo Clinic recommends sleeping on your side with your knees slightly pulled up towards your chest with a pillow between your knees.

背痛會影響睡眠，讓你很難找到一個舒服的姿勢。如果你有慢性背痛，重要的是要治療潛在的原因。此外，你的睡姿也會對你的舒適度產(chǎn)生很大影響。適合你的位置可能取決于你的上背部還是下背部疼痛。為了減輕背部的壓力，醫(yī)生建議側臥睡姿，膝蓋向胸部微微上拉，膝蓋之間放一個枕頭。

5. Hormones:

5. 激素:

Your hormones play a role in several functions including sleep. When there is an imbalance or a fluctuation, shifting hormones can contribute to sleep disturbances. A woman’s menstrual cycle, pregnancy, perimenopause and menopause often cause hormonal changes that may affect their quality of sleep. For example, decreased estrogen can lead to hot flashes, which wake you up at 2 a.m. You can’t always control your hormones, but you can make your environment conducive for sleep, unwind before bed and stick to the same sleep schedule. If those strategies don’t help, talk with your doctor. Hormonal replacement therapy or additional treatment may be an option.

你的荷爾蒙在包括睡眠在內的多種功能中發(fā)揮作用。當出現(xiàn)不平衡或波動時，荷爾蒙的變化會導致睡眠紊亂。女性的月經(jīng)周期、懷孕、圍絕經(jīng)期和更年期通常會引起激素變化，從而影響她們的睡眠質量。例如，雌激素降低會導致潮熱，在凌晨2點把你叫醒。你不能總是控制你的荷爾蒙，但你可以讓你的環(huán)境有利于睡眠，睡前放松，并堅持相同的睡眠時間表。如果這些方法都不管用，和你的醫(yī)生談談。激素替代療法或其他治療可能是一個選擇。

6. Alcohol:

6. 酒精:

If you enjoy a cocktail before bedtime, you know alcohol may help you get to sleep. But the bad news is it actually can interfere with your quality of sleep. As the alcohol metabolizes and the effects wear off, it prevents deep sleep, which causes restless sleep throughout the night. Consider limiting alcohol a few hours before you hit the sack.

如果你喜歡睡前喝一杯雞尾酒，你知道酒精可能會幫助你入睡。但壞消息是，它實際上會影響你的睡眠質量。隨著酒精的代謝和作用逐漸消失，它會阻止深度睡眠，而深度睡眠會導致整晚無法入睡?？紤]在睡前幾小時限制飲酒。

7. Eating too late:

7. 吃太晚了:

A light midnight snack may be fine, but a heavy meal too close to bedtime may leave you tossing and turning during the night. Eating large portions before you turn in for the night can lead to indigestion and acid reflux. If you want a snack before bed, keep it light and stay away from spicy and greasy foods.

睡前吃點小點心也許不錯，但睡前吃頓大餐可能會讓你在夜里輾轉反側。睡前吃太多會導致消化不良和胃酸倒流。如果你想在睡前吃點零食，那就少吃點，遠離辛辣油膩的食物。