Previously not snoring now snoring may be caused by physiological reasons, upper respiratory tract infection and nasal polyps. 1. Physiological reasons: most patients are due to ageing and relaxation of submucosal tissues. When sleeping, the loose mucosal tissue narrows the airway under the effect of gravity, leading to snoring. 2. Upper respiratory tract infection: If the patient has upper respiratory tract infection, the pharynx and tonsils will be enlarged, leading to snoring. 3. Nasal polyps: Nasal polyps may cause snoring. More nasal polyps in the nasal cavity, obviously blocking the nasal cavity, airflow through the narrow nasal cavity vibration mucosa, can cause snoring. Patients who have the symptom of not snoring before and now snoring, should consult the doctor in time, make a clear diagnosis, and then carry out standardized treatment under the doctor’s guidance and advice.