Do you frequently toss and turn much of the night, wishing you could just fall asleep? It’s possible that you have insomnia. It’s a common sleep disorder that’s often frustrating and can surface gradually or suddenly. Insomnia is one of many sleep-related topics included in the Mayo Clinic Guide to Better Sleep.

Insomnia is a common sleep disorder that can make it hard to fall asleep or stay asleep. It also can cause you to wake up too early and not be able to get back to sleep. You may still feel tired when you wake up.

失眠（英語： insomnia ）是持续出现睡眠启动困难、睡眠维持困难、睡眠品质下降，并引发日间功能障碍的一种睡眠障碍 [1] 。 其表现可能有不易入睡（難以入眠）、很難維持較長時間的深度睡眠（難以維持睡眠）、睡眠时间减少、早醒、易醒、多梦，或是醒来后 ...

If you have trouble falling asleep at night, you may have insomnia, a common sleep disorder. Waking up in the middle of the night and taking a long time to fall back to sleep is also considered insomnia. So is waking up too early in the morning and feeling exhausted. Some people have insomnia every night for years—or a lifetime.

Insomnia is common and frequently occurs with other disorders. First-line cognitive behavioral therapy with or without medication can produce rapid, sustained alleviation of insomnia symptoms.