6-year-old child rhinitis nasal congestion serious if caused by acute rhinitis can be used decongestant, if caused by allergic rhinitis can be used glucocorticosteroid spray and so on. 1. Acute rhinitis can be characterized by nasal congestion, nasal discharge, sneezing, etc. It can be treated with decongestants, including hydroxymetazoline hydrochloride spray. 2. If nasal congestion is caused by allergic rhinitis, glucocorticoid drugs can be used, such as mometasone furoate nasal spray and budesonide nasal spray. Usually should try to avoid contact with substances that may cause allergies, such as pollen, willow, etc.. If the phenomenon of children’s rhinitis and nasal congestion is serious, go to the hospital in time for examination, the use of the above drugs should follow the doctor’s instructions.