Bragging is risky. Past research shows that braggarts can be perceived as narcissistic and less moral. In addition, they tend to be less well-adjusted, struggle in relationships and may have lower self-esteem. Women who brag are judged more harshly than men who do.
Is boasting good or bad?
However, because our feelings of self-esteem and self-confidence rest on being able to take pride in our achievements, it's not only okay, but healthy, to brag about yourself to yourself. ... There is also a great deal of research on the flip side of bragging, which is depression and low self-esteem.
Can boasting be good?
When people did boast, the study found that their self-promotions were received better by others if they were supported by evidence. ... But the original research was published well before the rise of social media and the culture of boasting and bragging it often promotes.