Postnasal drip syndrome in children may be caused by chronic rhinitis, may also be caused by chronic sinusitis, and may also be caused by adenoid hypertrophy, the causes are different, the treatment is different. 1. Chronic rhinitis: chronic rhinitis is a chronic inflammation of the nasal mucosa, due to increased secretion, often leading to secretion backward flow into the nasopharynx, resulting in post-nasal drip syndrome symptoms, the treatment should be directed at the chronic rhinitis to carry out the treatment, you can use budesonide and other drugs for treatment. 2. Chronic sinusitis: If children suffer from chronic sinusitis, especially the inflammation of butterfly sinus and sieve sinus, the inflammatory secretion can flow backward into the nasopharynx, and postnasal drip syndrome occurs, and the treatment can be used to treat the disease with drugs such as loratadine, budesonide, mometasone furoate, and so on. 3. Enlarged adenoids: Enlarged adenoids can also cause an increase in secretions from the nasopharynx, resulting in postnasal drip syndrome, which can be treated with ephedrine drops and surgical removal of enlarged adenoids. In addition to the above diseases, other diseases can also cause postnasal drip syndrome in children, which should be consulted promptly to identify the cause and ask the doctor to dispose of it. All of the above medications should be used under doctor’s supervision to avoid unnecessary harm caused by incorrect use.