Why sudden hearing loss spikes in summer: Researchers find the cause

South Koreans should take extra care with their health during the hot and humid summer months, as a new study reveals a link between the season's climate and sudden hearing loss. Researchers have identified a significant correlation between high temperatures, humidity, and the occurrence of this acute auditory condition.

The study, conducted by a team at Kangdong Kyung Hee University Hospital, analyzed over 360,000 health insurance data points collected between 2007 and 2019. By comparing data with a control group suffering from inguinal hernia, a condition unaffected by seasonal changes, the team found that sudden hearing loss rates were lowest in winter and peaked during the summer. The findings indicate that weather conditions, including temperature and humidity from one to two days prior to an event, play a crucial role.

“

Most vascular diseases increase in winter, but sudden hearing loss is actually more dangerous in summer, which is an interesting result of this study.

Researchers pinpointed "hot, humid, and rainy" weather as the condition posing the highest risk for sudden hearing loss. This "Korean-style summer" climate, characterized by rapid shifts to hot and humid conditions, appears to be a key factor. Unlike regions with consistently high temperatures but less climatic variability, South Korea's distinct seasonal changes clearly influence the 발병 risk.

While the exact cause of sudden hearing loss remains unclear, the study suggests that physiological changes in the body during hot and humid weather may affect the delicate microvasculature of the inner ear. Dehydration can increase blood viscosity, and heat stress can alter vascular function or trigger inflammatory responses. The inner ear's blood supply relies on extremely fine microvessels, making it particularly sensitive to these circulatory changes. The study emphasizes that sudden hearing loss should be understood not just as an ear condition but as one linked to systemic blood flow and environmental stress, recommending integrated treatment approaches.

“

Sudden hearing loss should be understood not as a simple local ear disease, but as a disease related to systemic blood flow and environmental stress.