Diseases & Conditions

Insomnia is a common sleep disorder in which a person has persistent difficulty falling asleep, staying asleep, waking up too early, or experiencing sleep that is not refreshing — despite having adequate time and opportunity to sleep. These sleep difficulties cause significant distress and impair daytime functioning. Insomnia is classified as short-term (acute, lasting less than 3 months, often linked to a specific stressor) or chronic (lasting 3 months or more, occurring at least 3 nights per week). It is the most common sleep disorder worldwide, affecting an estimated 10–30% of adults. In Nigeria, insomnia is underrecognised and underreported but significantly impacts work performance, mental health, and quality of life.