Coughing up a lot of sticky phlegm is not easy because there is a lot of phlegm and it is sticky. Phlegm is a self-protection mechanism. When bacteria or viruses invade the bronchial tubes, they will be adsorbed by this mucus and then form phlegm to be coughed out of the body. A lot of sticky phlegm is usually a sign of inflammation in the respiratory tract, commonly seen in pharyngitis, bronchitis, pneumonia and other diseases, and when the phlegm is too sticky, it will adhere to the walls of the airways, and cannot be discharged even through coughing. Patients who have a lot of sticky phlegm that is not easy to cough up can drink more water in their daily life, or physically dispel phlegm by patting their backs, etc. The vibration produced by the patting can make the phlegm detached from the trachea wall and thus easier to be coughed up. If the patient has been in this discomfort for a long time, some expectorant drugs such as Ambroxol and Acetylcysteine can be used under the guidance of a doctor. There are many reasons for the above symptoms, if the long-term coughing situation does not improve, you should go to the hospital to find out the cause of the disease and give appropriate treatment.