Sudden snoring may be caused by overwork, acute tonsillitis and acute rhinitis, etc. You should actively consult a doctor to improve the relevant examination and diagnosis and standardize the medication and treatment. 1. Overwork: overwork can cause excessive relaxation of the pharyngeal muscles, resulting in muscle collapse and airway narrowing, thus suddenly snoring. 2. Acute tonsillitis: when tonsillitis causes narrowing of the pharyngeal cavity due to obstruction of part of the airway, the impact of the airflow on the soft palate will lead to the symptom of sleep snoring. 3. Acute rhinitis: acute rhinitis patients may be caused by nasal congestion and open mouth breathing, airflow impact on the soft palate vibration before suddenly start snoring. Sudden snoring, may also be acute sinusitis, acute adenoiditis and other causes, such cases should be promptly to the hospital, follow the doctor’s instructions for a systematic examination, after a clear cause of targeted treatment.