Sleeping always drooling may be sleeping posture is not correct, may also be suffering from oral diseases such as periodontitis, there may be suffering from local nerve diseases such as facial neuritis, etc., need to analyze specific problems. 1. Sleeping position is not correct: some people like to sleep on their stomachs, due to nasal breathing is not smooth, there will be open-mouth breathing, then there will be always drooling symptoms, generally improve the sleeping position can be improved. 2. Suffer from oral diseases: for example, periodontitis, gingivitis, etc., due to inflammation stimulation, oral secretions increase, there will always be the performance of drooling at night when you sleep, often accompanied by red and swollen gums, periodontal pus and other manifestations. 3. Suffer from local nerve diseases: such as facial neuritis, due to inflammation affects the nerve control facial muscle activity, then sleep will always appear drooling, often accompanied by crooked corners of the mouth, speech leakage and other manifestations. Because of the reasons for always drooling, if it is not caused by incorrect sleeping posture, it is recommended to go to the regular hospital in time to improve the relevant examination, to clarify the cause of the disease, and to be targeted treatment.