Nasal allergy, also known as allergic rhinitis, is an overreaction of the nasal cavity to irritants such as dust mites, pollen, mold, air pollution, pet dander, or sudden temperature changes. Given Hong Kong's humid climate, frequent use of air conditioning, and prevalent issues with dust mites and air pollution, many people suffer from recurrent sneezing, a runny nose, nasal congestion, and an itchy nose. To relieve nasal allergies, in addition to avoiding allergens, you can establish a comprehensive, long-term daily management routine focusing on home hygiene, nasal care, indoor air quality management, sleep, diet, and nutritional support.