Honestly, that is not entirely known.
Some has known causes related to external events, but much of it has far more complex internal (e.g. psychological, neurological, biochemical) causes that are not yet understood.
Low self-esteem.
A cause could be a childhood Experience or maybe your just going threw a troubled time . My advise is , If you think you might be Depressed ,. go to a Doctor , or you could go to a therapist or councilor.
many things can cause this but from experience, i have found that bullying is a main cause, but more precisely, the fact than an individual may not feel good enough and this may lead to not feeling like there's a place in the world, all sorts of abuse can trigger this.
family problems also have an effect as the sibling of some sort may feel like something is their fault, leading them to reflect on life, therefore leading them to remember the bad happening, this is because of a simple process the brain does whilst in this frame of mind, if you think positive, you will be positive, if you think negative, it will haunt you greatly (y)
Neurotransmitter imbalances are the immediate cause of diagnosable clinical depression. Such imbalances can trace to causes like those mentioned above, but can also strike unexpectedly for no apparent reason in people with no such prior history.
These are usually easily correctable with antidepressant medication. But counseling may be needed to correct situational problems and inadequate learned coping behaviors that exacerbate the symptoms and produce comorbidities (e.g. drinking).
Most likely, depression is caused by a combination of genetic, biological, environmental, and psychological factors. It is often a lack of a certain chemical in your brain and/or genetic and/or brought on by a certain environment or event in a person's life. There is no official cause.
Depression is caused by the inability to construct a future plan with own thoughts. Isolation is a major cause for depression. Lack of sunlight, drinking and substance abuse are also causes for depression.
There are numerous causes of depression. One of the most common causes is biological. Some people have an imbalance in the chemicals of the brain and if these neurotransmitters are lacking then one is liable to suffer depression. Another common cause is trauma and grief after being attacked or suffering the death of a loved one for example. Stress can also be a common cause.
chemicals in the brain that transmit messages between nerve cells--is believed to be key to depression,
Depression is caused by chemical imbalance in the brain. Drinking alcohol also depresses mind and body functions.
An undersupply of serotonin is most likely linked to depression.
depression
The most common forms of mood disorders fall into the range of depression.
depression
DEPRESSION
depression
false
Gold.
Depression is not only a common mental disorder, but one of the single most common. Somewhere around one in five men suffer from depression, and one in three women.
Jobs
false
Depression can have such organic causes as infections if the brain becomes involved, but no there is nomicroorganism that causes depression.