During that period, the students who reported checking their social media more regularly showed greater neural sensitivity in parts of the brain like the amygdala, Telzer said.

Source: https://www.ctvnews.ca/health/for-adolescents-social-media-might-be-a-brain-changer-researchers-say-1.6217473

Telzer said this suggests that teens who grow up constantly checking their social media are becoming hypersensitive to peer feedback.

Source: https://rapidcityjournal.com/lifestyles/health-med-fit/frequent-social-media-checks-may-affect-young-brains/article_b0705256-71ff-511f-a907-ee3d3d7f8335.html