1. Dong min park

2. Depression is a condition of mental disturbance, associated with low mood. Depression may change the way the patient view the world, in a more negative way. This not only affects the affected individual, but also the family, friends and personal relationship.

3. The symptoms are the following: Agitation Restlessness Irritability Concentration difficulty Isolation from society Loss or gain in weight and appetite Feeling of worthlessness Suicidal attempts Sleeping problem Lack of energy and hope

4. The biological theory of why depression happen is due to monoamine deficiency, simply put, a chemical imbalance. Treatment: use anti-depressants such as TCA, MAOI, SSRI, and SNRI.

5. The psychological theory is that low self-esteem, self-depressive, self-defeating, distorted thinking, negative self-concepts, and a lack of self-efficacy can cause depression. Treatment: therapy such as cognitive behavior therapy, interpersonal therapy, counseling, narrative therapy, and positive psychology.

6. The social theory is that wrong parenting, poverty, social isolation and such stress causing environment can cause depression. Treatment: Social support from family and friends by showing no discouragement and being kind and understanding.