A 3-year-old child with a cough and runny nose that hasn’t cleared up in 2 weeks can be caused by low resistance, recurrent respiratory infections, pneumonia, rhinitis and other conditions. 1. low resistance: if the 3-year-old child resistance is low after the illness recovery time will be longer, it may lead to cough runny nose 2 weeks after the situation has not been cured. 2. Repeated respiratory infections: Repeated respiratory infections can also lead to a 3-year-old child with a cough and runny nose that hasn’t cleared up in 2 weeks. 3. Pneumonia: If the cough and runny nose caused by pneumonia is relatively long, usually accompanied by fever and other symptoms, there will be a 3-year-old child cough and runny nose 2 weeks did not heal the situation. 4. Rhinitis: If a 3-year-old child with rhinitis may also have a cough and runny nose 2 weeks did not heal the situation, usually yellow snot, post-nasal drip cough. 3-year-old child cough runny nose 2 weeks did not heal, there may also be other reasons, it is recommended to go to the hospital in time to clarify the cause of the disease, in the doctor’s help for targeted treatment or treatment.