These days I’d guess the most common causes of sleep issues are poor sleep hygiene and stress. If you haven’t heard the term before, “sleep hygiene” refers to how well you look after your sleep quality every night. Having a consistent sleep schedule is part of good sleep hygiene, but it also refers to making sure your bedroom is quiet, avoiding blue light after dark, not scrolling feeds on your phone right before bed, not bringing work to bed, etc.
Stress is another common cause of low sleep quality. It can cause insomnia as well. Another common cause of sleep conditions is sleep apnea, which can lower sleep quality even if it isn’t severe enough to cause insomnia. The good news is that most of the common causes of sleep issues are treatable; sleep apnea can be mitigated with SomnoMed devices, for example. And you can lessen the impact of stress on your sleep by doing things that help you decompress before going to bed.