SAD Is a type of depression that you experience during seasons or times of year. Depression is a low mood that lasts for a long time and affects your everyday life.
if you have SAD, you will experience depression during some seasons, or because of certain types of weather or temperature. You can experience it in winter or summer.
It is common to be affected by changing seasons and weather, or to have times of year when you feel more or less comfortable. For example, you might find that your mood or energy levels drop when it gets colder or warmer or notice changes in your sleeping or eating patterns.
However, if your feelings are interfering with your everyday life, it could be a sign that you have depression. And if they keep coming back at the same time of year, doctors may call this seasonal affective disorder (SAD) or seasonal depression.