Keeping your emotions in check all the time may not be a good thing as it could lead to depression.

The researchers conducted their study on a group of volunteers who had been through a stressful situation recently in their lives. The volunteers were asked to complete an online survey in order to measure their stress and depression levels and were later asked to watch a series of sad film clips.
On measuring the depression levels after watching the clips, the researchers found that those who had no power to influence the source of their stress in life had lower depression levels compared to those who could have controlled their source of stress.
“When stressors are controllable, it seems that cognitive reappraisal ability isn't just less beneficial, it may be harmful. It may be, for instance, that more active strategies like problem-solving and seeking social support could be particularly beneficial in more controllable contexts”, Dr Troy said.
Source-Medindia