I've always had a problem with temperature. I am always cold, even when most people are warm. People have always commented on it. Yet I will sweat a lot. Winter is tough for me symptom wise. My hope is to eventually move somewhere with a warm climate in the winter. But too hot can also trigger symptoms and I really suffer in bright sunshine. If I don't wear shades, I get black swirls in front of my eyes and have to go somewhere dark until they are gone. I mostly have to wear sunglasses whatever the time of year when I am outdoors.