他因为太多烦恼而失眠了。

Tā yīnwèi tài duō fánnǎo ér shīmián le.

He couldn't sleep because he had too many worries.

失眠会影响健康。

Shīmián huì yǐngxiǎng jiànkāng.

Insomnia can affect your health.

我最近常常失眠。

Wǒ zuìjìn chángcháng shīmián.

Lately I've often had insomnia.