Bronchitis in the elderly is categorized into acute and chronic phases. Symptom reduction can be promoted by improving body immunity and medication, which are analyzed as follows. 1. Acute stage: During the attack of bronchitis, antibiotics such as cefuroxime can be used to control the infection, phlegmatic drugs such as bromhexine can be used, and asthmatic drugs such as theophylline controlled-release tablets can be used to suppress coughing and expectoration. 2. Chronic phase: the elderly are generally weaker, the body’s immunity is poor, should always eat some protein-rich foods, such as eggs, meat, etc., supplemental nutrition. They should also quit smoking and avoid inhaling harmful gases and other harmful particles. Those with recurrent respiratory infections can use immunomodulators, such as thymidine, etc.; they should also be vaccinated, such as the flu vaccine and pneumonia vaccine. When the elderly bronchitis recurring, accompanied by more obvious symptoms, it is recommended to go to the hospital in a timely manner, under the treatment of the doctor for medication, avoid unauthorized use of drugs, to prevent the triggering of adverse consequences.