Nasal congestion in six-year-old children is a common symptom that can be seen in a variety of situations, such as cold peripheral environment, respiratory tract infections or rhinitis, etc. There is no simplest treatment, and reasonable interventions need to be made according to the different causes of nasal congestion. 1. Cold peripheral environment: 6-year-old children may have nasal congestion when the ambient temperature is too low, and usually need to increase clothing and pay attention to warmth, and the symptoms of nasal congestion can be relieved. 2. Acute upper respiratory tract infection: 6-year-old children in the respiratory tract infection can appear nasal congestion symptoms, can be accompanied by fever, sore throat and other discomforts, the need for formal diagnosis and treatment, such as the use of physiological sea saline nasal spray to alleviate the symptoms of nasal congestion, it is recommended that the timely hospital consultation. 3. Allergic rhinitis: children may also have the above symptoms, may be accompanied by runny nose, night sleep snoring, etc., need to use glucocorticosteroids (such as mometasone furoate) for local nasal spray, reduce nasal inflammation and edema, and pay attention to stay away from allergens. The above medications should be used under the guidance of a physician, and children six years old with nasal congestion are advised to consult a physician to determine the cause of the condition and have the condition evaluated and intervened by a specialist.