While we all require sleep each night to function correctly, drifting off isn't always straightforward. Numerous factors can leave you tossing and turning, whether you're overthinking tomorrow's tasks or consuming too much caffeine before bedtime, which disrupts your melatonin levels. Occasional sleep troubles affect most people, but when they become a regular or ongoing problem, it's classified as insomnia . Various factors can trigger insomnia, ranging from stress and depression to shift work