If the nasal congestion is bad for a long time, the following causes are mainly considered. 1. For children, sometimes they may stuff substances into the nasal cavity, such as beans or peanuts, because they are greedy, which may cause prolonged nasal congestion, and the runny nose often has a foul smell. 2. Sometimes it is simple rhinitis or hypertrophic rhinitis, and if the patient has a poor physique, there will be allergic rhinitis. 3, mainly consider the possibility that the patient has nasal polyps or nasal papillomas inside the nasal cavity, or even malignant tumors inside the nasal cavity. So in life, if the patient has a long time nasal congestion, must be actively examined for symptomatic treatment.