Insomnia is primarily characterized by what?

Insomnia is primarily characterized by difficulties in sleeping. This condition can manifest in various ways, including trouble falling asleep, staying asleep, or waking up too early and not being able to return to sleep. The core issue is the difficulty in achieving restful and adequate sleep, which can lead to various negative effects on physical health, mental well-being, and daily functioning. Understanding insomnia requires recognizing that it affects a person's ability to sleep, thereby distinguishing it from symptoms or conditions that are unrelated to sleep disturbances.