what is the difference between internal nostrils and internal nares
Answers
The external valve is easiest to define as the nostril margin where air meets the nose and its position relative to the septum. External nasal valve collapse is often dynamic, meaning when you breathe in there is collapse of the nostril.
The internal nasal valve is further in the nose, with the boundaries consisting of the lateral nasal sidewall or caudal(bottom) end of the upper lateral cartilage, the nasal septum and the head of the inferior turbinate. This roughly corresponds to the junction of the upper and lower lateral cartilages dependent on the patient. Again assessing dynamic versus statis obstruction can make a difference.
I would seek out care from a facial plastic surgeon who can more readily help you identify where your level of obstruction may be.
Two openings called anterior nares (or nostrils; exterior nares) allow air to enter the nose and pass into the nasal cavity. Individually, each opening is referred to as an anterior naris