Learn about Seasonal Affective Disorder (SAD), its symptoms, causes, and treatment. Visit urgent care near you to manage SAD today. Seasonal Affective Disorder (SAD) is a form of depression tied to the changing seasons, often striking in the fall and winter when days grow shorter and sunlight is scarce. It’s more than just the “winter blues”—SAD is a real mental health condition that can significantly affect mood, energy, and daily life. In South ...