What are the causes of nosebleeds in September?

Nosebleeds in September may be related to physiological and pathological factors. Common pathological causes include acute rhinitis and allergic rhinitis.

I. Physiological Factors

September falls within autumn, when decreased air humidity can weaken the elasticity of nasal mucosa. When the nasal mucosa is irritated by actions such as wiping or impact, it becomes more susceptible to damage and bleeding.

II. Pathological Factors

1. Acute Rhinitis

Autumn is a period of high activity for pathogens such as Coxsackie virus, rhinovirus, and rotavirus. Once the nasal mucosa becomes infected with these pathogens, interstitial damage to the mucosa and submucosal tissues may occur, leading to symptoms such as nasal bleeding, nasal congestion, and runny nose.

2. Allergic Rhinitis

In September, certain allergens such as specific pollens, cotton fibers, and chemical fumes may trigger allergic reactions. Individuals with allergic constitutions may develop localized non-specific immune responses upon exposure to these allergens, resulting in intermittent nosebleeds, frequent sneezing, nasal congestion, and rhinorrhea.

However, other conditions such as deviated nasal septum or sinus cancer cannot be ruled out. If symptoms persist or worsen, individuals should seek medical evaluation promptly to avoid delays in diagnosis and treatment.