Seasonal Affective Disorder (SAD) is most commonly associated with winter blues, and it afflicts about 5 percent of Americans.
But for less than 1 percent of those people, this form of depression strikes in the summer. Warm weather depression arises when the body experiences a "delay adjusting to new seasons," says Alfred Lewy, MD, professor of psychiatry at Oregon Health and Science University, in Portland.
Instead of waking and enjoying dawn, the body has a hard time adjusting, he says, which could be due to imbalances in brain chemistry and the hormone melatonin.
<strong>More from <a href="http://www.Health.com" target="_hplink">Health.com</a>:</strong>
<a href="http://www.health.com/health/gallery/0,,20419609,00.html" target="_hplink">10 Tips for Dating With Depression</a>
<a href="http://www.health.com/health/gallery/0,,20483493,00.html" target="_hplink">The Most Depressing States in the U.S.</a>
<a href="http://www.health.com/health/gallery/0,,20428990,00.html" target="_hplink">Depressing Jobs: Career Fields With Hight Rates of Depression</a>
Thinkstock
