What causes allergic rhinitis to flare up every September?

Nasal allergies recurring every September may be caused by factors such as temperature changes, exposure to allergens, or bacterial infections.

1. Temperature changes

September usually falls within a seasonal transition period when temperatures gradually drop. Individuals sensitive to temperature may experience nasal inflammation triggered by cold air irritating the nasal mucosa.

2. Exposure to allergens

During this time, many flowers bloom simultaneously and release large amounts of pollen into the air. Patients who are prone to pollen allergies may develop symptoms upon contact with these allergens.

3. Bacterial infection

The environment in September still favors the growth and spread of bacteria and viruses. When these pathogens enter the nasal cavity through respiration, they can also trigger rhinitis.

In addition, changes in air humidity and other environmental factors may also contribute to the recurrence of nasal allergies during this specific period.