Insomnia is a disorder that consists of the inability to fall asleep or stay asleep. In patients who suffer from it, the duration and quality of sleep are low and it interferes with their daily life. This disorder manifests with difficulty falling asleep, staying asleep, or early morning awakening. According to the Spanish Society of Neurology (SEN), the causes of insomnia can be established according to its origin: Primary causes are those related to maintaining adequate sleep hygiene or psychological aspects.