Scientists still do not fully understand why humans dream when we sleep. Some dreams are pleasant, while some are hard to wake up from because we wish they were true. Sometimes, we experience dreams that are unpleasant and even scary. While there is no confirmed explanation for why we have nightmares, many experts believe they are a response to fear and trauma. Stress, anxiety, mental health conditions, some medications, and lack of sleep may increase the risk of nightmares.
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Scientists still do not fully understand why humans dream when we sleep. Some dreams are pleasant, while some are hard to wake up from because we wish they were true. Sometimes, we experience dreams that are unpleasant and even scary. While there is no confirmed explanation for why we have nightmares, many experts believe they are a response to fear and trauma. Stress, anxiety, mental health conditions, some medications, and lack of sleep may increase the risk of nightmares.