Dreams are a mixed bag, they can be quite positive or negative experiences, or just a tedious regurgiation of one's daily experiences that one could do without.

Dreams are a mixed bag, they can be quite positive or negative experiences, or just a tedious regurgiation of one's daily experiences that one could do without. The phrase "a deep and dreamless sleep" generally implies a good night's sleep, and excessively vivid dreaming can be rather exhausting. Curiously there are some ways to manage dreams, here's an interesting article on researchers investigating what's apparently a form of lucid dreaming, very Inception-like work: https://www.science.org/content/article/scientists-entered-peoples-dreams-and-got-them-talking https://www.science.org/content/article/scientists-entered-p... Interestingly I find those long Youtube 'relaxing sleep' videos to be a good way to moderate dreaming, possibly via a similar mechanism. Maybe white noise has a similar effect. One I use has waves quietly crashing on the beach, although once it resulted in a dream of walking through a thunderstorm in a forest and I'm pretty sure every time the waves crashed I'd experience a lightning-and-thunder strike which was rather alarming, complete with vivid imagery, and eventually woke me up. However, using the same video over and over again seems to result in a constant point of reference when dreaming, leading to more peaceful and less intensely random dreams. (Right after the Ukraine war broke out I started having vivid nuclear annihilation dreams, which were a bit much, and using these Youtube videos mitigated most of that) For those who struggle with sleeping through really intense dreams, strong indica cannabis will suppress dreams for many people, but the side effects are a lot of grogginess the next morning. Maybe for PTSD it's worth the tradeoff, but for many the cost-benefit ratio will be too negative.