Insomnia is classified as a sleep disorder. Sleep disorders are characterized by difficulties procuring quality and restful sleep which can result in daytime fatigue and impaired mental and physical functioning.   Although insomnia is considered a sleep disorder, it often walks hand in hand with mental health conditions, such as depression, anxiety, or cognitive disorders. Mental health conditions can often result in the development of insomnia or other sleep-related disorders. On the flip side, difficulty sleeping can also exacerbate mental health conditions.    No matter what the cause, if you’re suffering from consistent trouble sleeping it’s important to get it addressed by a healthcare professional as soon as possible to prevent serious mental and physical complications.