Chronic throat clearing may begin as a habit, but other causes include asthma, allergies, chronic sinus infections and side effects of medications, states Clarity Allergy Center. Acid reflux can cause throat issues, including frequent throat clearing, according to the International Foundation for Functional Gastrointestinal Disorders.
Many patients experience a constant tickle in the throat, which may be induced by simple sinusitis or by complex issues such as irritation of the uvula, tonsils or throat, notes Clarity Allergy Center. Sinus infections can produce mucous or post-nasal drip that causes irritations and the urge to clear the throat frequently.
When gastric acid reaches the vocal chords, it can result in inflammation that leads to chronic throat clearing, notes the International Foundation for Functional Gastrointestinal Disorders. The inflammation is called laryngeal pharyngeal reflux, and treatment can curtail the reflux and ease the urge to clear the throat.