What is SAD?
Seasonal Affective Disorder is type of depression. It affects you during the winter months, especially September to April because the days are shorter and there is less natural sun light.
Many people find that they feel low during the winter and may eat and sleep more. But if it is affecting your everyday life it may be SAD.
The further away you live from the Equator the more likely you are to have SAD, which is why lots of people in Scotland have it.
What's the treatment?
A common treatment for SAD is light therapy. Light therapy involves being exposed to very bright light for a couple of hours every day. You can do normal activities such as working or eating whilst you sit there.
For more information go to the Seasonal Affective Disorder Association (SADA) website.