Phlegm in the throat may be caused by reflux pharyngitis, chronic simple pharyngitis, chronic sinusitis and other diseases.
1. Reflux pharyngitis: the reflux of gastric contents stimulates the inflammatory reaction of the throat, mucosal edema and increased secretion of the glands, triggering the symptom of phlegm in the throat all the time.
2. Chronic simple pharyngitis: under the stimulation of inflammatory factors, there are lymphocytes and plasma cells around the glands as the main inflammatory cell infiltration, the mucous glands are active and increased secretion, leading to the phenomenon of phlegm in the throat all the time.
3. Chronic sinusitis: bacterial infection in the sinus secretions increase, from the nasal cavity through the nasopharynx backflow to the throat, resulting in the throat has been the performance of phlegm.
The phlegm in the throat may also be caused by chronic rhinitis, chronic bronchitis and other diseases, you need to actively seek medical attention, systematic examination to clarify the diagnosis and cause of the disease.