Answer:
Step-by-step explanation:
Depression is a common and serious medical illness that negatively affects how you feel, the way you think and how you act. It can lead to a variety of emotional and physical problems and can decrease your ability to function at work and at home.
Depression symptoms can vary from mild to severe and can include:
Feeling sad or having a depressed mood
Loss of interest or pleasure in activities once enjoyed
Changes in appetite — weight loss or gain unrelated to dieting
Trouble sleeping or sleeping too much
Loss of energy or increased fatigue
Difficulty thinking, concentrating, making decisions
Restlessness or feeling slowed down
Feeling worthless or guilty
Depression symptoms must last for at least two weeks to be considered a diagnosis.
Depression is one of the most common mental disorders in the world. According to the World Health Organization (WHO), more than 264 million people suffer from depression, which is about 4.4% of the world's population.
The number of cases of depression has been increasing over time. In the United States, for example, the prevalence of depression has increased from 9.5% in 1990 to 16.6% in 2017.