Drooling when the elderly speak is generally due to physiological aging, but we cannot rule out the possibility that it may be caused by facial paralysis or craniocerebral diseases. 1. Physiological reasons: due to aging, the elderly may have muscle atrophy in the cheek area, causing a decrease in muscle tone, plus the elderly may have partial tooth loss, resulting in easy drooling when talking. 2. Facial palsy: Older people may have facial palsy that causes dysfunction of one or both facial muscles, and the corners of the mouth cannot be closed, which leads to drooling when talking. 3. Craniocerebral disease: it may indicate that the patient suffers from acute cerebral hemorrhage, cerebral infarction, etc. When suffering from these diseases, drooling while talking may be caused by the brain’s inability to coordinate the muscles of the oral cavity to match the movement. There are many other reasons for drooling while talking, once you find the elderly drooling while talking, you must be alert to the possibility of cerebral hemorrhage and other conditions, you need to take the elderly to the hospital as soon as possible to avoid accidents.