The "nasal salute" refers to habitual rubbing of the nose due to constant irritation. It usually signifies an underlying allergic phenomena that is producing a profuse rhinorrhoea requiring frequent wiping. It is most marked in children.
A horizontal "nasal crease" usually develops below the bridge of the nose.
Observation of either a nasal crease or a nasal salute may point to a diagnosis of allergy rather than simply, one of recurrent infections.