Water leaking from the corners of the mouth when drinking water may be caused by facial neuritis or stroke, or it may be caused by Parkinson’s disease and other causes of facial muscle stiffness. If the middle-aged or elderly people have water leakage at the corner of the mouth when drinking water, it is likely to be caused by facial neuritis or stroke. Patients with facial neuritis have facial nerve involvement and paralysis of the facial muscles; patients with stroke have damage to the nerve conduction bundles and can also have paralysis of the facial muscles. In addition to leaking from the corners of the mouth when drinking water, patients in these cases can often be seen with a crooked mouth. If the patient is an elderly person, often leakage of water from the corners of the mouth when drinking water, but the patient does not have accompanying symptoms such as crooked corners of the mouth, it may be caused by a number of diseases that lead to stiffness of the facial muscles, such as Parkinson’s disease and so on. Drinking water leakage at the corners of the mouth is specifically how to analyze specific problems, it is recommended that the patient is not appropriate to consult a doctor in a timely manner, under the guidance of a professional physician clear diagnosis and treatment.