People suffering from depression often show distorted thinking. Everything looks bleak to them, and they hold extremely negative views about themselves, their situation, and the future. Trapped in their pessimism, they brood/obsess over their problems and blow them out of proportion. Feeling hopeless and helpless, they may even start to see suicide as their only way out.
In many cases, the first time someone becomes depressed, it has been triggered by an unwelcome or traumatic event, such as being sacked, divorced, or physically or sexually assaulted. Fortunately it is also treatable. By restoring serotonin (happiness producing Neurochemical) levels with the help of antidepressant and anxiolytics person can bounce back to normal level of functioning.