Minor deviations of the nasal septum usually do not cause any complaints, but deviations that significantly narrow the nasal cavity can obstruct nasal breathing, which, in addition to feeling unwell and snoring, may also predispose to sinusitis and respiratory infections. Nasal congestion makes it difficult to ventilate the sinuses, which is why the patient may also suffer more frequently from sinusitis and otitis media. Due to the difficulty in breathing through the nose, mouth breathing becomes more prominent, leading to many health problems. People who breathe through the mouth are more prone to respiratory infections, as the processes in the nasal and sinus cavities (air filtration, humidification) are not carried out, leading to more frequent upper and lower respiratory infections.