Continuing for several days with a low fever and yellow nasal discharge is common in colds and flu, usually caused by viral infections or bacterial infections, need to clarify the cause of taking antiviral drugs or antibiotics. 1. Upper respiratory tract viral infection, through the blood test to clarify. You can follow the doctor’s instructions to take Qingkailing granules or Lotus Qingdian capsule, etc. These drugs have antiviral effect and can relieve the symptoms. 2. Upper respiratory tract bacterial infection can be clarified through routine blood test and bacterial culture. Generally take cephalosporins to fight bacterial infection, such as cefuroxime, etc., and take aspirin to relieve fever and analgesia at the same time. After a cold, it is recommended to drink a lot of water, keep indoor air circulation, avoid spicy and stimulating food, and appropriate exercise to improve their own immunity. If there is any other discomfort, it is recommended to go to the hospital for active treatment.