Epistaxis is most common in which area of the nose?

Epistaxis, or nosebleeds, most frequently originates from Kiesselbach's triangle, also known as the Little area. This region is located in the anterior part of the nasal septum and is rich in blood supply from several different arteries, including branches of the maxillary artery, the anterior ethmoidal artery, and the sphenopalatine artery. Because of this dense vascularity and its superficial location, Kiesselbach's triangle is particularly susceptible to injury from various factors, such as trauma, dry air, or mucosal irritation, leading to nosebleeds.

In contrast, the other areas mentioned are less commonly associated with epistaxis. The posterior septum can certainly bleed, but it is less common than anterior bleeds and is often associated with more severe underlying issues or higher vascular pressures. The nasal turbinates also serve primarily to warm and humidify air and are not known to be a primary source of epistaxis. The frontal sinus is involved in sinus-related bleeding or infections but is not typically a direct source of epistaxis. Understanding the anatomy and vascular supply of the nose is crucial for managing and treating nasal bleeding effectively, which is why recognizing Kiesselbach's triangle is essential in clinical practice.