SAD stands for "Seasonal Affective Disorder". I have it myself really badly and my personal symptoms are : in the winter, I'm afraid of the darkness around me, the snow and the ice. I can't stand the harsh cold in the long Northern Canadian Winters. In the Summer, I can't stand the heat and humidity, I'm allergic to high UVs. I have to put on a lot of sunscreen and shower after. I can't stand the rain, it gives me a depressed feeling. During the Winter months, I do lumina therapy and have my Xmas lights on all year long. What about you?