The article presents a systematic review of publications on the methods of piriform aperture (PA) surgery in the treatment of nasal obstruction. Various surgical techniques are reviewed critically in terms of topographic anatomy and the effectiveness of the method. The contradictory opinions about the access to the piriform aperture and the methods of its correction are revealed. The topic of surgery of the PA as an area of the internal nasal valve in the treatment of nasal obstruction is equally interesting for ENT and plastic surgeons. The analysis of the literature showed the effectiveness and safety of operations to expand the PA. None of the authors in the studied works notes any changes in the appearance of the nose during observation in the postoperative period. The biggest challenge in understanding PA surgery, which has yet to be understood, is determining the indications for a particular method of surgery, which justifies the continuation of the search, taking into account the clinical features of the patient and the topographic level of the disorder. In the future, we need studies with objective measurements, control and long-term careful observation to better study the effect of the expansion of the piriform aperture on the relief of nasal obstruction.