Pediatric allergic rhinitis usually develops due to exposure to allergens, and the main symptoms are clear watery nose, nasal itching, nasal congestion and sneezing, which may be accompanied by itchy eyes and no fever. The main symptoms of common cold are running nasal mucus in the early stage and pus yellow nasal mucus in the later stage, which can be accompanied by fever and general discomfort, and the onset time is usually 7~10 days.