Sudden Cold Snap triggers Early Onset of Allergic Rhinitis for Millions
SEOUL, SOUTH KOREA - December 4, 2025 - A dramatic and unseasonably cold temperature drop across South Korea is prompting a surge in allergic rhinitis cases, with pharmacies reporting increased demand for over-the-counter antihistamines. Many individuals are already seeking relief,bracing for a potentially severe allergy season weeks ahead of its typical start.
The rapid shift in weather, from mild autumn temperatures to near-freezing conditions within days, is believed to be a key factor. This abrupt change stresses the immune system, making individuals more susceptible to allergens like dust mites and mold spores, which thrive in colder, damper environments. Pharmacists are observing a meaningful uptick in customers purchasing medications such as Zyrtec, with some reporting inquiries for bulk purchases of 100-tablet supplies. the early onset raises concerns about a prolonged and intense allergy season, potentially impacting productivity and quality of life for a substantial portion of the population.