Kids argue at school, push each other after a foul on the court, ghost a former BFF.

And parents often roll their eyes when these conflicts happen.

But in fact, the way kids handle conflict with peers may have major long-term health repercussions. New research from the University of Virginia shows that ramifications from schoolyard conflicts may be tied to premature aging and other issues — even tumors, arthritis and cancer — later in life.

[The middle school “cool kids” are not alright]

“It’s easy for parents to think these adolescent relationships are trivial, that they don’t mean much, that it’s all passing,” said Joseph Allen, U-Va.’s Hugh Kelly Professor of Psychology, who led the study. “This is to say they aren’t trivial.”

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