入にゅう眠みん障しょう害がい

noun

sleep onset insomnia; difficulty falling asleep

Medical term for a type of insomnia where the main problem is falling asleep initially, rather than staying asleep.

• 入にゅう眠みん障しょう害がいのため、寝ねつきが悪わるい。

  I have trouble falling asleep due to sleep onset insomnia.