Depression caused by season change is known as seasonal depression. It occurs mostly in winters. You may feel hopeless and worthless due to this problem. Energy levels decrease and there is loss of interest. This depression causes irritation, tiredness and sluggishness. Heaviness in limbs, oversleeping and increased weight are some other symptoms of seasonal depression. Sunlight exposure is the best way to treat this problem. Keep the curtains and blinds open so that sunlight enters inside the house. Walk outside in the open. Do regular exercise. It is a very good remedy for stress. Following are the top 9 ways to treat seasonal depression.