Heat doesn't just make you uncomfortable when you're living with chronic illness - it can trigger significant symptom flares that feel overwhelming and unpredictable. Understanding why this happens and having a plan for managing heat-triggered symptoms can be the difference between a challenging day and a medical emergency. Why Heat Triggers Symptom Flares When you have ME/CFS, Fibromyalgia, or Long COVID, your body's ability to regulate temperature is often compromised. This