Rumination happens when a person spends a significant amount of time thinking and worrying about a problem. The thought that is ruminated feeds itself continuously, so the person becomes stuck in a constant cycle of worry that eventually distorts their perception of the reality of the situation.

Rumination

Villanova University

Georgetown University

In Buddhism, mental suffering is another term for mental illness.

Mental Suffering

Fabrizio, D. (ed.). (2009). Clinical handbook of mindfulness. Springer. 

Clinical Handbook of Mindfulness

- Following the eightfold path
- Practicing mindfulness

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