seasonal affective disorder (SAD)
It's common to feel affected by changes in the weather and seasons - we all have certain times of year that we enjoy more or less than others, for a variety of reasons. You might find that your mood changes when the weather gets colder or warmer, or notice changes in your energy levels, sleeping patterns or eating habits.
If these feelings are interfering with your day to day life, it could be a sign that you have depression. And, if they keep coming back at the same time of year, it might be a sign that you have seasonal affective disorder (SAD), otherwise known as 'seasonal depression'. SAD is also sometimes referred to as the winter blues, as symptoms are usually more apparent and more severe during the winter. However, some people with seasonal affective disorder may experience their symptoms during the summer, feeling better during the winter.
The symptoms of seasonal affective disorder are similar to those of depression, but they occur repetitively at a particular time of year. Everyone experiences the condition differently but, at its most severe, it is a seriously disabling illness, causing a variety of side effects.