Adjustment disorders

[Rihanna]

Adjustment disorders involve markedly distressing and impairing emotional and/or behavioral symptoms caused by an identifiable stressor.
(See also Overview of Trauma- and Stressor-Related Disorders.)
People often become sad, angry, or otherwise upset when unpleasant things happen. Such reactions are not considered a disorder unless the reaction is more intense than what is typically expected in the person

[Mark Zuckerberg]

a condition in which someone feels sad and hopeless as a result of a stressful event: