Taylor Swift's Eras Tour continued on Friday night in Toronto with the fifth of nine total shows in Canada. The now 14-time Grammy winner has been touring almost non-stop for the entire year, and at e

"TAYLOR LEAVING AND HUGGING ANDREA I CRY," wrote a fan on social media after capturing the sweet moment between Taylor Swift and her mom Andrea after the fourth Eras Tour show at the Rogers Centre in Toronto.

While there's an extreme surge of happiness for many fans who scored tickets to the concert of a lifetime, there can be intense sadness when it's over. A neurologist explains why.