Sinusitis in 4-5 year old children can be cured, but the specific treatment effect is related to the child’s physical condition. In childhood, prone to a variety of acute infectious diseases, the mucosa of the sinuses is relatively thick, the sinus openings are long and narrow, often adenoid hypertrophy and affect the physiological function of the nasal cavity, prone to endocrine dysfunction and the sinus mucosa have a negative impact on the sinus mucosa, and so on, are prone to the occurrence of sinusitis factors. Sinusitis is usually manifested as nasal congestion, runny nose, headache, etc., can be applied under the guidance of the doctor antibiotic drugs to reduce nasal inflammation, such as amoxicillin clavulanate potassium, etc., you can also use glucocorticoid drugs to treat, such as budesonide nasal spray. If the medication fails to improve the disease effectively and the disease affects the child’s normal life, the doctor may consider taking endoscopic sinus surgery to remove the sinus lesion tissue, with regular post-operative checkups and medication. If your child has abnormal behavior during treatment, such as nosebleeds, you should go to the hospital immediately, do the relevant sinus CT examination, and actively cooperate with the doctor for treatment.