Depression is a common serious illness, and most people who experience it need treatment in order for getting better. Most of the people with depression never seek treatment. But they can get better if they move for counselling and treatment if needed.
Everyone feels sad at some point of time in life, but this sadness and unhappiness is usually for a short period of time and ends after time. When this unhappiness remains for a long time due to which there is a disturbance in the normal life of the person and the person does not feel like working, stops taking interest in daily activities and does not sleep, then in such a situation the person's whole life is affected, this is depression.
Such a situation becomes a cause of pain for the person suffering from depression and his caregivers or family members.