There are many reasons for coughing up yellow pus sputum and back pain, such as pharyngitis, pleurisy and pneumonia, etc., and medication can be given according to the cause. 1. Pharyngitis: the causes of pharyngitis include microbial infections and environmental factors, etc. After the disease, it is easy to cause patients to have dry and itchy throat, sore throat and difficulty in swallowing, etc. When the inflammation stimulates the mucous membrane of the throat, it will cause coughing with yellow pus sputum and back pain, which can be treated by taking pharyngitis tablets and Scutellaria baicalensis oral solution under the guidance of a doctor. 2. Pleurisy: pleurisy is a kind of inflammation that occurs in the pleural area, which may be caused by autoimmune diseases and infectious diseases, and will cause chest tightness, chest pain and coughing up phlegm, etc., and when coughing, it will lead to yellow pus sputum and back pain, which can be treated by taking drugs such as Cefixime capsule and Amoxicillin capsule under the doctor’s instruction. 3. Pneumonia: Pneumonia is mainly caused by pathogenic infections, usually manifested in coughing, coughing up sputum and dyspnea, etc., with the development of the disease will lead to coughing up yellow pus and sputum and back pain, you need to follow the doctor’s instructions to take moxifloxacin hydrochloride capsule, roxithromycin capsule and other drugs treatment. In addition, coughing up yellow pus and back pain may also be caused by acute bronchitis, lung cancer and costochondritis, etc. You need to go to the hospital in time to do a comprehensive examination to clarify the cause of the disease and cooperate with the doctor’s treatment.