In the clinic, we often meet anxious parents who bring their children for treatment: their children have been suffering from cold for several weeks or even two or three months, but the symptoms of nasal congestion and runny nose have not been alleviated and are persistent, yellow pus is increasing, and they open their mouths to breathe during sleep and their noses whistle. He has used topical, internal, western and traditional Chinese medicines, but no improvement is seen. The child had poor appetite, malnutrition and wasting. Judging from the symptoms, the child is likely to have chronic sinusitis, often accompanied by chronic rhinitis. Most of the time, the acute inflammation is not completely cured in the acute phase, or due to some other factors that cause the acute inflammation to become chronic. The skin of the upper lip is peeling or cracked, and the anterior nostril is crusted and eroded. Rhinoscopic observation reveals pus accumulation in the common nasal passage, middle nasal passage and olfactory groove. Due to the backflow of nasal mucus into the pharynx, pus can be observed flowing down from the nasopharynx at the posterior pharyngeal wall, and the breath is often foul smelling. A CT scan of the sinuses may reveal inflammation of the sinuses. It should be noted that sinusitis in children is often not an isolated disease, and chronic cases are often associated with lesions in adjacent organs and interact with each other, such as otitis media, adenoid hypertrophy, allergic rhinitis, asthma, and bronchitis. Therefore, the treatment of sinusitis in children has a global view and is based on conservative drug therapy. 1. oral antibiotics cephalosporins or erythromycin/clarithromycin etc. for 2-3 weeks. 2, intranasal drops of nasal mucosal constrictor, the concentration is lower than that used in adults, 0.25-0.5% ephedrine, the course of treatment <7< span=""> days. 3, if there are allergic factors, anti-allergic nasal drops, such as Acetapine (Zolpidem hydrochloride) nasal spray, Lefotene (levocabastine hydrochloride) nasal spray. Topical glucocorticoid drops for nasal cavity. 4.Orally take drugs that make the nasal mucus thinner, such as Ambroxol, Oronema, etc. Pay attention to the presence of adenoid hypertrophy during treatment. Adenoid hypertrophy plays an important role in the development of sinusitis, because adenoid hypertrophy obstructs the posterior nostril, making the nasal discharge poor, and at the same time, adenoid tissue can harbor bacteria and viruses, so it is the source of infection; and the mucous pus accumulated in the nasopharynx can make the adenoid edema increase. Therefore, in children with adenoid hypertrophy accompanied by sinusitis, adenoidectomy should be performed first, and sinusitis is often easier to treat after surgery. The size of the adenoids and the proportion of the airway can be determined by taking a lateral X-ray of the nasopharynx, which is generally considered to be larger than 70%. In addition, it is important to note whether a child with sinusitis has a complication of secretory otitis media, as the mucus and pus that accumulate in the nasopharynx can cause inflammation and edema of the eustachian tube. Pay attention to how well the child listens in class and whether the child has to turn up the volume when watching television. If these conditions are present, it suggests that the child’s hearing may have declined. Most children with sinusitis can recover after appropriate treatment and are generally not treated surgically. However, sinus surgery can be considered after repeated treatment of unsatisfactory symptom improvement or if nasal polyps are found in the nasal cavity and seriously affect the ventilation of the nose after nasal examination and sinus CT examination. However, since children are still growing and developing, the scope of surgery should not be too large, and the normal nasal structure should be preserved as much as possible so as not to affect the jaw and facial development.