Why is there always phlegm in my throat when I wake up in the morning or is it cold?

Get up in the morning there is always phlegm in the throat or ice, clinically there may be the following cases: the first case, the most common may be nasal snot backflow into the throat to form phlegm, because the patient’s nasal cavity a large number of snot retention, with the patient to change the position of the snot due to the effect of gravity into the throat, this snot in the nasal retention time is relatively long, so by the influence of the outside world temperature has become very cold, and into the After the patient’s throat, so there will be this cold feeling. This disease is most common in the clinic is chronic hypertrophic rhinitis, after group sinusitis and other related diseases. The second situation, some patients have chronic pharyngolaryngitis, long-term open mouth breathing during sleep leads to the accumulation of phlegm in the oropharynx, the patient will feel phlegm in the oropharynx after getting up to form this manifestation, clinically, this phlegm is also cold is more common. Other types, some patients such as phlegm inside the lungs, this is not very common, because the temperature of phlegm inside the lungs should be hotter, and the human body temperature is about the same, because it belongs to the secretions inside the human organs. In conclusion, if the patient always feels that there is phlegm in the throat or ice, it is best to go to the ENT department and let the doctor check the nasal cavity and nasopharynx to rule out the possibility of any disease in this area.