Taylor Swift is angry 鈥 like, dress-up-like-a-zombie-and-emerge-from-the-grave angry. To see Swift proudly display her heart on her sleeve is nothing new: From her early days as a pop-country singer-songwriter, she has built a career upon writing emotion-fueled music about her personal experiences. And most of us loved it. But innocent choruses aimed at her Rolodex of exes 鈥 think 鈥淚 Knew You Were Trouble鈥 and 鈥淲e Are Never Getting Back Together鈥 鈥 have recently evolved into something more sinister.

Before her now legendary 2009 MTV VMAs show drama with Kanye West, it would have been difficult (even laughable) to imagine a character as saccharine as Swift with enemies. However, with the release of 鈥淟ook What You Made Me Do,鈥 her first single after three years without new music, the formerly perky Swift (RIP 鈥淪hake it Off鈥) re-emerged as a bitter villain bent on getting back at those who wronged her.

While Swift鈥檚 very public feuds with the likes of Katy Perry and Kimye began as an extension of her trademark emotional honesty (a la 鈥淏ad Blood鈥), her new work, instead built on the rickety framework of unforgiveness, has surpassed innocent authenticity and entered toxic territory.

This time, Swift isn鈥檛 here to put memory to melody. And based on her lyrics (鈥淢aybe I got mine, but you鈥檒l all get yours鈥), she鈥檚 not interested in stirring drama for drama鈥檚 sake 鈥 she鈥檚 seeking recompense for crimes against her reputation. The girl鈥檚 got grudges, and she鈥檚 here to make good on them for better or for worse. But probably, mostly worse.

While channeling emotions like anger or stress into creativity can be a healthy coping mechanism, experts say unforgiveness 鈥 in Taylor鈥檚 term, 鈥淏ad Blood鈥 鈥 can have profoundly negative effects on both physical and mental health. So while Swift appears to be positioning herself to sabotage those who have tarnished her reputation, her method is counterproductive. From a psychological perspective, she鈥檚 essentially sabotaging herself.

鈥淗aving a vendetta or holding a grudge is toxic,鈥 writes author Christopher Bergland in Psychology Today. 鈥淥ver the long run 鈥 if you don鈥檛 make conciliatory efforts to neutralize interpersonal conflicts 鈥 holding a grudge will wreak havoc inside your body. In many ways, holding a grudge is a form of self-sabotage.鈥

How, exactly, does the sabotage go down? The havoc of a grudge usually begins with an isolated incident of anger, which escalates if it isn鈥檛 managed. Here鈥檚 how it works: Our anger or bitterness toward someone ignites the sympathetic nervous system, resulting in a release of cortisol, also known as the fight-or flight or stress hormone. Stress left unchecked, or worse, celebrated, creates a toxic environment in our bodies, setting the scene for disease, which means that negative emotions can literally make us sick. For example, scientists attribute elevated cortisol levels to physical issues like lower immunity, learning and memory problems, lower bone density, weight gain, blood pressure problems, and even lower life expectancy.

Mentally, rampant cortisol has equally toxic effects: It鈥檚 known as a trigger for depression and other mental illnesses, along with decreased resilience, especially among adolescents. And according to one study, 20 to 50 percent of individuals develop depression after recently experiencing a major life stressor (ongoing shade thrown from other celebrities and/or unrelenting media seems like a big one, to be honest).

Of course, there鈥檚 speculation that Swift鈥檚 feuds, and by extension, her fancy new anger,聽are manufactured or exaggerated as the most well-executed act of PR gymnastics in recent celebrity history. But even if that鈥檚 the case, her ongoing victim persona is not isolated. Because whether or not Swift herself is as guilty of grudges as we think she is, she may be setting an unhealthy example for her fans, many of them young and impressionable, by glamorizing toxic emotions, literally dressing them up in diamonds.

Given her multi-million-follower platform, her cryptic and admittedly terrifying Instagram image of a snake (there is no clearer symbol of poison!) before she released her single received 9.5 million views. It鈥檚 safe, then, to say Swift exists on the cutting edge of the pop culture algorithm, more likely setting trends than responding to them.

Public response to Swift鈥檚 new direction hasn鈥檛 been totally positive. But in spite of the criticism surrounding Swift鈥檚 resurgence, people are listening. Her video for 鈥淟ook What You Made Me Do鈥 had the biggest debut in YouTube history, with over 43 million views in 24 hours. And according to Billboard, the single is set to hit number one on the charts next week (sorry, 鈥淒espacito鈥).

Thankfully, Taylor isn鈥檛 trapped in her self-made toxicity, and neither are we, if we are willing to let go of our grudges (though for a celebrity act conjured solely on the premise of bitterness, there may be some heavy deconstruction involved). For most of us, finding a better, healthier path may be as simple as reclaiming positivity and seeking to mend broken relationships.

Mental health professionals associate forgiveness and restored connection with the 鈥渓ove hormone鈥 oxytocin, which affects our minds and bodies inversely, like the yang to cortisol鈥檚 ying. While bitterness increases cortisol and diminishes oxytocin, connection re-establishes it, which could result in reduced anxiety, general emotional stability and even increased longevity.

Chances are good that Taylor Swift will outlive her angry stage and reset her emotional algorithm to impact us in a different, likely more potent way. But as she works out her public identity, whether she鈥檚 simply living through painful relationships or carefully orchestrating feuds from her Rhode Island mansion, we can hope that she will peer beyond the veneer of her fame and into the deeper places of her body and mind 鈥 for our sake, but mostly for her own. Because what she sang on 1989鈥檚 鈥淣ew Romantics鈥 is true: The best people in life are free.

What鈥檚 your take on the 鈥渘ew鈥 Tay? Tell us @BritandCo!