Final answer:
Suborbital coloring is not typically associated with upper airway obstructions and is not an indication of such an obstruction.
Step-by-step explanation:
Signs of an upper airway obstruction can include stridor, which is a high-pitched sound resulting from turbulent air flow in the upper airway, snoring, which may indicate partial obstruction, and a chronic open-mouth posture due to difficulty breathing through the nose. However, suborbital coloring, which refers to discoloration around the eyes, is not usually associated with upper airway obstructions.
This symptom could be related to other conditions like allergies, eczema or sometimes bruising due to injury. Hypernasality, in contrast, is associated with issues in the velopharyngeal mechanism, which is different from an obstruction and therefore is not an indication of an upper airway obstruction. The final answer in a two line explanation in less than 300 words would be: Suborbital coloring is not an indication of an upper airway obstruction.