Gastroesophageal Reflux Disease (GERD): This condition is often associated with excessive saliva production as the body tries to neutralize the acid refluxed into the esophagus. The increased saliva can help buffer the acid and protect the esophagus.

Dental Problems: Issues such as gum disease, tooth decay, or poorly fitting dentures can stimulate saliva production.
Anxiety or Stress: Emotional states can lead to increased saliva production due to the body's fight-or-flight response.
Pregnancy: Hormonal changes during pregnancy can affect saliva production, leading to an increase in some women.
Medication Side Effects: Certain medications, such as anticholinesterases, can increase saliva production as a side effect.

Rabies: Although rare, rabies infection can cause excessive saliva production due to the virus's effect on the nervous system. Early recognition is crucial for treatment and prevention of further transmission.
Tetanus: Tetanus infection can lead to increased salivation among other symptoms like muscle stiffness and spasms. Prompt diagnosis and treatment are essential to prevent serious complications.
Organophosphate Poisoning: Exposure to organophosphates (found in some pesticides) can cause an overstimulation of the parasympathetic nervous system, leading to excessive salivation, among other symptoms.

Sjögren's Syndrome: An autoimmune disorder that can affect the exocrine glands, including the salivary glands, leading to abnormal saliva production.
Hyperthyroidism: In some cases, an overactive thyroid gland can lead to increased saliva production, though this is less common.
Neurological Disorders: Certain conditions like Parkinson's disease or cerebral palsy can affect the nerves controlling saliva production, leading to excessive salivation in some cases.