The temperature of your bedroom can also impact your sleep, says Martin. Research has shown that nightmares are a common issue among those who suffer from SAD and symptoms of depression, so during the colder, darker months when SAD is triggered, you may dream more often.' 3. 'If you suffer with SAD, you may find that you are experiencing increased vivid dreams and nightmares during the winter months. RELATED: Best mattress toppers 2022 for the perfect night’s sleep More than simply making your feel lethargic, SAD has a huge impact on your quality of sleep during the winter months, according to Martin. 'Furthermore, this lack of vitamin D can also trigger Seasonal Affective Disorder, which has been found to be a main reason for sleep disturbances, vivid dreams and nightmares.' 'Vitamin D is imperative for serotonin production, which is vital for maintaining that important sleep-wake cycle and keeping our levels of melatonin production in check. LOOK: Shoppers swear by this weighted blanket for a great night's sleep - and it's less than £30

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'During the winter months, your sleep is directly affected because your vitamin D levels are reduced as a result of shorter days and lack of sunlight,' explains Martin.

Vivid dreams are common in autumn Why am I having vivid dreams? 1.

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