The consequences of untreated nasal polyps vary among individuals. For some, the effects may be relatively severe, while for others it may not be very noticeable. It primarily depends on the size of the nasal polyps themselves. If the polyps are small and do not cause significant clinical symptoms, even without prompt treatment, their slow growth may lead to no significant symptoms. However, if there are many polyps and they grow rapidly, it can easily lead to nasal congestion, a runny nose, and reduced sense of smell. Some patients may also develop sinusitis due to poor ventilation and drainage in the nasal cavity. In severe cases where there are excessive amounts of nasal polyps, it can even affect the development of the nasal structure, leading to conditions like a crooked nose or saddle nose.