Getting the blues may occasionally happen. You cannot have smiles and joy 24/7 in your life. Sometimes we just get down due to certain thoughts, events, or people and their words or deeds. We may feel sad after watching a movie or remembering something from our past. There is a reason for this mood, right?

Sometimes we get the blues out of nowhere. They just show up without any reason and stick  around. Why does that happen and what to do?

Sometimes sadness can be related to your physical health. Anemia, or low blood iron, or hormonal imbalance can cause feelings of mild or even severe depression.

The menstrual cycle related reason:

Every woman has regular hormone fluctuations in her body that happen due to what nature has given us. You may feel sad when these hormones change and estrogen begins to drop. Hormones fluctuate during the menstrual cycle and may create vulnerability to sad or depressed moods in the premenstrual period, as well as during perimenopause, and menopause.

Other reasons:

Brain chemicals

When you get stressed out, your brain follows with an appropriate reaction by increasing or lowering certain brain chemicals. Some people are more sensitive to the effects of stress, while others aren’t. Some researchers conclude that low levels of the neurotransmitters serotonin and norepinephrine in your brain contribute to part of what makes you feel depressed.  Scientists are just starting to uncover the biochemistry behind the brain.

The weather

Less sunshine during the winter months can give us the blues, and this effect is more pronounced for some people than others, according to Keller and colleagues.

Little sunlight and no activity

Exposure to outdoor sunlight provides us with vitamin D, while a deficiency in it may result in a depressed mood. Most people in the US have insufficient or deficient levels of Vitamin D. People with dark skin are more vulnerable to vitamin D deficiency, due to a decreased ability to process vitamin D from sunlight.

Hormones

Our endocrine glands produce substances that influence many bodily functions, including growth and development, mood, sexual function, and metabolism. The levels of certain hormones affect the way we feel too. Some symptoms of depression are associated with thyroid conditions. There are also individual differences in how much our moods are vulnerable to the effects of hormones.