Seasonal affective disorder, sometimes known as SAD, is a type of depression that comes and goes with seasonal changes.
Though it’s sometimes referred to as the “winter blues,” SAD can happen during other transitional times of the year, too. We aren’t quite sure what causes it, but, per the NHS, “the main theory is that a lack of sunlight might stop a part of the brain called the hypothalamus working properly”.
It could affect up to 1.6 million people in the UK.
And though SAD is often most associated with a low mood, sleep expert and GP Dr Daisy Mae, who has paired with Com...
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