There are many reasons why patients often have dreams at night, in summary, the main reasons are the following: 1. For example, patients are used to drink strong tea, strong coffee and other excitatory drinks before going to bed, which can easily lead to excitement in the cerebral cortex of patients and make them dream easily in the stage of light sleep. Patients are also prone to dreaming at night when they watch some tense and exciting movies and dramas; 3. Patients often dream at night may be caused by neurological weakness.