(1) "Z"-plasty; acquired stenosis of anterior naris; treatment.

(2) With the development of the fish, the anterior naris of the fry rose above the external surface and developed into a tubular extension, which opened to the outside.

(3) Physiologically, the function of these naris is reflected in the flow of breath in the nostrils.

(4) Either of the external openings of the nose; a naris .

(5) Methods:318 children with OSAHS without antiaditis in the recent one year and without deflection of nasal septum, rhinitis, posterior naris stenosis, tongue body hypertrophy and etc.

(6) Nasal process of premaxilla forms the whole posterior margin of the naris.

(7) All cases were satisfied with the outline of external nose and non - constriction of anterior naris.

(8) Treating group inspired the 0 9% sodium chloride from anterior naris, and spewed it from mouth through nasal cavity and nasopharynx. The control group washed the mouth with the conventional method.

(9) Result: 4 cases were cured with satisfied outline of unclear scar and non constriction of anterior naris.

(10) In the fall of 2005, during our field work in Laos, we observed the naris drinking in the Tai-Kang population in the Houaphan province.