As the seasons change so can your mood. This week, Dr. Richard Muller from Buckingham Family Medicine says seasonal depression is what's going around.

He says it can start setting in during this time of the year. Symptoms include dark or blue mood, middle of the night awakenings, loss of interest in things you enjoy, crying spells, loss of appetite and suicidal thoughts.

Dr. Muller says this form of depression is triggered by the days getting shorter, so it tends to improve by mid-winter or spring.

When it comes to treating seasonal depression Dr. Muller recommends anti-depressants or light therapy. Light therapy is the use of bright lights, especially early in the morning, to trick the body into thinking it's still summer.

Dr. Muller says light therapy has been shown to prevent relapses in some patients, but usually seasonal depression cannot be prevented.

Depression is a potentially fatal condition and should be taken very seriously. If you or someone you know suffers from these symptoms, Dr. Muller suggests you see a heath care provider as soon as possible.