Colds with phlegm in the throat may be related to more secretions caused by edema of the throat due to viral infection, or it may be related to nasal secretions backing up into the throat, which can be treated with general therapy and medication. Colds are caused by viral infections and may manifest as nasal congestion, runny nose, cough and phlegm. If the phlegm in the throat is caused by inflammation in the throat, the patient needs to drink more water and use drugs such as Ambroxol and Acetylcysteine to dilute the phlegm, so that the patient can cough up the phlegm easily. If the phlegm is caused by nasal secretions, nasal mucosal decongestants such as ephedrine drops can be used to improve the symptoms. Coughing up yellow sputum in the case of a cold is indicative of a secondary bacterial infection. Bacterial infections are usually treated with antibiotics, such as azithromycin and cefixime. Phlegm in the throat can also be caused by other illnesses, such as acute tracheo-bronchitis and pneumonia. If the symptoms are not relieved or aggravated, it is recommended to go to the hospital, complete the examination, and follow the doctor’s instructions to use drugs. At the same time, patients need to eat a light diet, eat more vegetables and fruits, and maintain moderate exercise, which is conducive to the recovery of the disease.