What could be the reason for a 13-year-old girl frequently experiencing nosebleeds?

Frequent nosebleeds in a 13-year-old girl may be caused by physiological factors, or by pathological conditions such as allergic rhinitis or deviated nasal septum. The specific analysis is as follows:

I. Physiological Factors

Regular consumption of spicy, stimulating, or heat-inducing foods can lead to dryness of the nasal mucosa. Forceful nose-blowing may then cause the nasal mucosa to rupture, resulting in epistaxis (nosebleed).

II. Pathological Factors

1. Allergic Rhinitis

After exposure to airborne allergens such as dust or pollen, the nasal mucosa becomes congested and swollen, which may lead to capillary rupture and nosebleeds. It is recommended to use medications such as fluticasone propionate nasal spray, mometasone furoate nasal spray, or budesonide nasal spray under a doctor's guidance to control allergies and improve symptoms.

2. Deviated Nasal Septum

A deviated nasal septum causes the mucosa to be easily impacted by airflow, leading to erosion and nosebleeds. It is recommended to visit a hospital for surgical correction via procedures such as localized septoplasty, septorhinoplasty, or three-line tension-reducing septoplasty.

Additionally, nosebleeds could also result from other causes such as nasal hemangioma, leukemia, or nasal cavity cancer. Specific diagnosis requires medical evaluation and examination at a hospital, followed by treatment according to medical advice.