Rice particles stuck deep in the nasal cavity, usually in the folds of the nasopharynx or the posterior nasal passage, can be discharged slowly over time. If the foreign body feeling is obvious, you can pump back the nasal snot and spit out the pharyngeal cavity, or you can rinse the nasal cavity with a rinse ball to rinse saline or warm water, which can rinse out the foreign body in the nasal cavity. If you don’t have a rinse ball, you can consider sucking saline or plain water by yourself. When sucking, you can lift the water up and have a rush after inhaling the nasal cavity, but you must control the strength to prevent the saline or plain water from entering the pharyngeal cavity and causing choking.