There can be many possible causes of frothy sputum like allergies
, inflammation and infections. It can be due to
any condition related to
or the lungs. Post nasal drip, allergies, pollution all can lead to constant throat irritation and frothy sputum. Nasal congestion, nose bleeds, facial pain, recurrent sinus infections all are the symptoms of a deviated nasal septum. Consult an ENT specialist for more queries and assistance. I sincerely hope it helps.
Best wishes and regards!