Physiological hypersalivation
Commonly seen in infants and young children when the milk teeth erupt, the mechanical stimulation of the gingival trigeminal nerve by the erupting teeth can lead to increased saliva production.
Pathological hypersecretion of saliva
Excessive salivary secretion can be caused when the salivary glands are stimulated, such as periodontitis, pulpitis, gingivitis and other oral inflammatory diseases, where the accumulation of food residues leads to the growth of a large number of bacteria in the mouth and painful inflammation, which stimulates the saliva-secreting glands and leads to excessive salivary secretion.
Excessive salivation can also be caused if the patient has abnormal oropharyngeal and facial muscle movements, e.g. cerebral palsy, facial palsy, etc.
abnormally increased salivation when the patient has a neuromuscular transmission disorder involving the nerves involved in innervating swallowing, as seen in patients with myasthenia gravis.