http://positivetranceformations.com.au/blog/sad-and-hypnotherapy/ SAD (Seasonal Affective Disorder) is not a huge problem on the Gold Coast, but it does happen. SAD is caused by people not getting enough exposure to sunlight, as sunlight stimulates the pineal gland to produce feel-good chemicals. To overcome despondency caused by a spell of gloomy weather, get outside more to chill out and to exercise, increase your exposure to natural light and eat more oily fish.