Depression is a very common and serious medical condition which has a negative impact on your feelings, actions, and thinking. A person suffering from depression will feel sad. There will be no interest anymore for things or activities that used to be joyful before. Depression eventually will lead to many emotional and physical problems, significantly interfering with a person’s life.
Feeling sad is something quite normal after a sudden change in life. For example, it’s normal to feel sad after death of a loved one, after divorce, after losing a job, etc. However, being sad is not the same as having depression. Depression can affect anyone, no matter of gender, age, or race.
Sign of Depression #1: Persistent Sadness
Feelings of sadness and depression every now and then are normal reactions to certain events in life such as ending of a relationship, the death of a loved one, getting fired, being in financial problems, etc. But when this sadness lasts for days and even weeks, and especially when it is accompanied by feelings of hopelessness, worthlessness, helplessness, depression, might be the cause.
You should know that there are various degrees of sadness, but if sad because of depression then normal functioning is impaired.