There are many reasons for poor sleep quality, and the common causes are mainly the following: First, environmental factors such as strong indoor light, unsuitable room temperature, noisy environment, etc. can affect sleep and lead to insomnia and dreaminess. Secondly, drug factors can also affect sleep, such as aminophylline, caffeine, glucocorticoids, all of which can excite the brain nerves and lead to insomnia and excessive dreaming. Again, disease factors can also affect sleep, such as frequent urination at night, cough, itchy skin, pain and other symptoms, can lead to poor sleep quality, insomnia and excessive dreaming, you need to improve the relevant examination according to the specific cause before treatment. Finally, patients with psychosomatic factors such as anxiety and depression can also suffer from sleep disorders and need psychological intervention and counseling by specialists to improve their symptoms.