Nasal breathing is of great importance for professional athletes because of the peculiarities of carbon dioxide metabolism in the body. Problems with nasal breathing caused by post-traumatic deformities of the nose can be successfully corrected with the help of rhinoseptoplasty, but the possibility of performing this surgery on patients under 18 years of age is a discussed matter. This study aimed to analyze the results of the effect functional rhinoseptoplasty has on nasal breathing, consider rhinoseptoplasty as the preferred method of treatment for adolescents with post-traumatic deformities of the structures of the nose. The study involved 15 professional athletes aged 15–18 years with post-traumatic deformities of the external nose and troubled nasal breathing. Five of them (33.3%) were female, 10 (66.7%) were male; all underwent open rhinoseptoplasty.  The NOSE and SCHNOS questionnaires were used to assess the symptoms of nasal obstruction before and after surgery. Post-surgery, all patients subjectively noted that their nasal breathing improved, which was confirmed by the filled questionnaires. There were no significant complications registered during the follow-up period.  Functional rhinoseptoplasty is a viable surgical option for adolescents under 18 years of age.