Why Do IBS Flare-Ups Rise Seasonally

Seasonal changes cause a worsening of irritable bowel syndrome (IBS) symptoms, as shifts in temperature, light, environmental allergies, and stress affect bowel movements and their sensitivity. Cold weather may trigger intestinal spasms or slow down bowel activity, while reduced sunlight decreases vitamin D levels and leads to mood disturbances that heighten pain sensitivity. Additionally, seasonal allergies and infections during winter increase the severity of symptoms, and stress and a sedentary lifestyle can further aggravate the condition.