There is no cold and phlegm in the throat is related to reflux pharyngitis, allergic pharyngitis and chronic pharyngolaryngitis. 1. Reflux pharyngitis: stomach contents flow back into the throat, stimulating the mucous membrane of the throat to increase secretion, and the symptoms of feeling phlegm in the throat appear. 2. Allergic pharyngitis: patients in contact with allergens such as pollen, fur, etc., may cause excessive secretion of mucus in the throat, phlegm. 3. Chronic pharyngolaryngitis: it is a chronic inflammatory disease of the pharynx and larynx caused by repeated episodes of acute pharyngolaryngitis and long-term stimulation of adverse physical and chemical factors, manifested by symptoms such as foreign body sensation or itchy sensation, and may also be due to the increase in secretion due to the old phlegm in the throat. There are many other causes of phlegm in the throat without a cold, including the above, and you should consult a doctor for a clear diagnosis.