Why do I feel depressed for no reason. Depression can have many causes, all of which are complex and can be difficult to understand. In some cases, feelings of depression can be clearly connected to an experience in someone’s life, such as a tragic loss or a violent event. Other people may be aware they have a family history of mental illness and, as a result, may not be caught off guard by a diagnosis of depression.
However, some people become depressed and don’t know why. They may feel they do not have a “reason” to be depressed—especially if they perceive their life as being “good” or “easy” compared to others.
The Weather Less sunshine during the winter months can give us the blues, and this effect is more pronounced for some people than others. Researchers Keller and colleagues studied hundreds of people and found that during the spring, moods improved; participants also reported more outdoor activities. We may also be more cognitively flexible and able to think creatively about solving our problems in the spring, compared to winter. A subgroup of people suffer from Seasonal Affective Disorder, a condition in which the winter blues turn into full-blown depression along with associated changes in sleep, appetite, and motivation. Sufferers are more likely to be women. Exposure to outdoor sunlight also provides us with vitamin D, a substance with clear links to depressed mood.
Hormones are substances produced by the endocrine glands that influence many bodily functions, including growth and development, mood, sexual function, and metabolism. Levels of certain hormones, such as those produced by the thyroid gland, can be factors in depression. In addition, some symptoms of depression are associated with thyroid conditions. Hormones fluctuate during the menstrual cycle and may create vulnerability to sad or depressed moods in the premenstrual period, as well as during peri-menopause, and menopause. There are individual differences in how much our moods are vulnerable to the effects of hormones. If you are more vulnerable, you may want to consult a physician to see if medications are needed to help regulate your hormones. You could also try alternative medicine treatments, such as acupuncture, to reduce hormone-related mood imbalance.
Brain Chemicals Some of us have brains that are more sensitive to the effects of stress. Researchers are just beginning to uncover the biochemistry behind this differential. The most common forms of antidepressants target the neurotransmitters serotonin and norepinephrine because some research concludes that low levels of these chemical motivators are part of what makes us depressed. However, only some people respond well to the most common forms of antidepressants, while others try drug after drug with no substantial mood improvement. A recent research study, published earlier this year in Proceedings of the National Academy of Sciences, may reveal the reason why. The research suggests that differences in the way our brain’s process a chemical called galanin may make some of us less resilient and able to bounce back after difficult experiences.