Elderly people who have phlegm that cannot be coughed out need to drink more water. Drinking more water can moisten the airway and dilute the phlegm, thus promoting the discharge of phlegm, or nebulized inhalation of saline is also more helpful. You can adopt the way of physical discharge to promote the elderly to discharge phlegm, the elderly can take the posture of frog lying on the bed, the effect is better, the next person can help to gently pat the back, the elderly gently cough a few times, phlegm is often easy to come out. The use of cough and phlegm medicine is also more effective, for example, you can use Ambroxol hydrochloride nebulized inhalation treatment, which can dilute the phlegm and promote the discharge of phlegm. Ambroxol hydrochloride is also an oral medication that can be taken orally for the treatment of phlegm, or you can also take Ambroxol Oral Solution, Lung Power Cough Combination or Compound Fresh Bamboo Liqueur, all of which have a certain effect on phlegm.