What are the major sources of psychological stress?

What is psychological stress?
The stress that we ourselves generate in our minds, which are personal and unique to each person who's experiencing them, is called psychological stress . It's symptoms include worrying, anxiety, feeling depressed and so on.

It's Major sources are:
1. Frustration: When we are unable to achieve certain goods and aspirations or are hindered to achieve them by anyone or anything, frustration arises.

2. Conflicts: When there are two different incompatible needs or motives and they clash with each other, conflicts are bound to happen in in our minds.

3. Internal Pressure: We've heard, 'expectations lead to disappointment'. Internal pressure arises from our own beliefs and expectations inside us.

4. Social Pressure: People in our surrounding can sometimes put on a load pressure and excessive demands while asking us to work along with them which can cause social pressure resulting in personality clash sometimes.