The reason for this is the physiological and pathological factors, as follows: 1. Physiological factors: the most common reason is that young people often gain weight too quickly, or have excessive obesity, which can easily lead to narrowing of the upper respiratory tract, causing a significant increase in respiratory resistance, resulting in serious snoring and continuous open-mouth breathing during sleep. 2, pathological factors: some patients may have a degree of nasal cavity, sinus inflammatory infectious or allergic disease factors, which can easily lead to congestion and swelling of the nasal cheek mucosa or edema, increasing nasal ventilation resistance, while some patients may also have adenoid hypertrophy, tonsils overly enlarged, soft palate hypertrophy, pharyngeal cavity narrowing and other factors, which may lead to snoring This may lead to the occurrence of snoring symptoms, and further detailed examination is needed to identify the cause.