Insomnia
Having trouble falling asleep, staying asleep or waking too early even when you have the chance to sleep, and this affecting your day.
A little more detail
Under ICSD-3 and DSM-5, chronic insomnia is difficulty falling or staying asleep despite adequate opportunity for sleep, with daytime impairment, on at least 3 nights a week for at least 3 months. The European guideline recommends CBT-I as first-line treatment.
Source: Riemann D, Espie CA, Altena E et al. The European Insomnia Guideline: an update on the diagnosis and treatment of insomnia 2023. J Sleep Res. 2023;32(6):e14035. doi:10.1111/jsr.14035