Cold and flu may be related to the lack of antiviral treatment for influenza, secondary bacterial infections, and not cold and flu diseases, which need to be clarified after the cause of the disease and cooperate with the doctor to standardize the treatment. 1. Influenza without antiviral treatment: Common cold is generally self-limiting and can be cured in 5-7 days. However, influenza requires active antiviral treatment at an early stage to relieve symptoms. If you are diagnosed with influenza, you need to use antiviral drugs such as oseltamivir to treat it. 2. Secondary bacterial infections: Common colds with secondary bacterial infections are likely to prolong the course of the disease and aggravate the condition. If it is combined with bacterial infection, antibiotics such as ceftazidime, azithromycin, levofloxacin, etc. should be taken as prescribed by the doctor. 3. Other diseases: allergic rhinitis can also cause nasal congestion, runny nose symptoms, need to stay away from allergens, and the use of budesonide nasal spray to ease the symptoms; cough variant asthma can also cause recurrent coughing, the treatment needs to use budesonide formoterol powder inhaler treatment. In addition, the cold has been bad may also be combined with pneumonia and other complications. If the cold symptoms have not been good, it is recommended to consult a doctor in time, improve the examination, clarify the diagnosis, and cooperate with the doctor to standardize the treatment.