What underlying conditions may be associated with epistaxis?

Epistaxis, or nosebleeds, can often be linked to a variety of underlying conditions, with hypertension and clotting disorders being particularly significant. Hypertension can increase the pressure in the blood vessels of the nasal mucosa, making them more prone to rupture and bleed. Similarly, clotting disorders affect the body's ability to form clots, which can result in prolonged or frequent bleeding, including from the nose. These conditions represent a more serious concern, as they can lead to more severe episodes of bleeding that may require medical intervention.

Allergies and asthma may contribute to nasal irritation and congestion, leading to circumstances where nosebleeds could occur, but they are not typically primary causes. Respiratory infections can cause inflammation and nasal passage disturbances, potentially leading to nosebleeds, but again, they are not as directly related as hypertension and clotting disorders. Sinusitis and bronchitis might cause discomfort and secondary nasal issues but do not directly contribute to the occurrence of epistaxis in the way that the noted conditions can. Thus, the connection between epistaxis and hypertension or clotting disorders is more clinically relevant.