Why do I keep spitting saliva?

Excessive salivation—often described by patients as “spitting frequently” or “constantly spitting saliva”—can stem from either increased saliva production (hypersalivation) or impaired clearance of normal amounts of saliva (e.g., due to swallowing difficulties, oral motor dysfunction, or behavioral habits). True hypersalivation is relatively uncommon; more often, the sensation arises from reduced swallowing frequency—such as during concentration, anxiety, or mild gastroesophageal reflux—or from local oral irritation (e.g., gingivitis, dental caries, ill-fitting dentures, or oral ulcers). Neurological conditions—including Parkinson disease, stroke, cerebral palsy, or bulbar palsy—can impair oropharyngeal coordination and lead to saliva pooling and drooling. Certain medications (e.g., clozapine, cholinesterase inhibitors, or some antipsychotics), pregnancy (especially in the first trimester), and systemic disorders like uncontrolled diabetes or liver disease may also contribute. A thorough evaluation—including history (onset, timing, associated symptoms such as heartburn, dysphagia, tremor, or weight loss), oral examination, and targeted investigations (e.g., endoscopy for reflux, neurological assessment, or salivary flow testing)—is essential to determine the underlying cause and guide appropriate management.