Breakups are emotional roller coasters. Actually that’s not true. If a breakup was anything like a roller coaster the end would be visible from the start, you could say ‘no thanks’ to the ride and at the end of it, for a hefty sum the memory could be savoured forever with a flimsy cardboard-framed photo.

Breakups are are more like being under a roller coaster.

Before we knew the science we knew the feeling, and used words associated with physical pain – hurt, pain, ache – are used describe the pain of a relationship breakup. Now we know why. The emotional pain of a breakup and physical pain have something in common – they both activate the same part of the brain

Brain scans of people recently out of a relationship have revealed that social pain (the emotional pain from a breakup or rejection) and physical pain share the same neural pathways.

In one study, 40 people who had recently been through an unwanted breakup had their brains scanned while they looked at pictures of their exes and thought about the breakup. As they stared at the photos, the part of the brain associated with physical pain lit up.

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As explained by researcher Ethan Kross, ‘We found that powerfully inducing feelings of social rejection activate regions of the brain that are involved in physical pain sensation, which are rarely activated in neuroimaging studies of emotion.’

He continues, ‘These findings are consistent with the idea that the experience of social rejection, or social loss more generally, may represent a distinct emotional experience that is uniquely associated with physical pain.’

In further support of the overlap between physical and social pain, Tylenol (an over the counter medication for physical pain) has been shown to reduce emotional hurt.

Research has found that people who took Tylenol (an over-the-counter medication for physical pain) for three weeks reported less hurt feelings and social pain on a daily basis than those who took a placebo.

The effect was also evident in brain scans. When feelings of rejection were induced, the part of the brain associated with physical pain lit up in participants who didn’t take Tylenol. Those who took Tylenol showed significantly less activity in that part of the brain.

Nobody is suggesting that the broken hearted turn to pain medication to reduce their lean towards Kleenex, Baskin-Robbins and repeated viewings of Love Actually. Long term use will cane the liver. Somebody else is waiting to fall in love with you, but you and your liver have to stay friends forever.

The Physical Side of a Broken Heart

The human brain loves love. Being in love takes the lid off the happy hormones, dopamine and oxytocin, and the brain bathes in the bliss. But when the one you love leaves, the supply of feel good hormones takes a dive and the brain releases stress hormones such as cortisol and epinephrine.

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In small doses, stress hormones are heroic, ensuring we respond quickly and effectively to threat. However in times of long-term distress such as a broken heart, the stress hormones accumulate and cause trouble. Here’s what’s behind the physical symptoms of a breakup:

Too much cortisol in the brain sends blood to the major muscle groups. They tense up ready to respond to the threat (fight or flight). However, without real need for a physical response the muscles have no opportunity to expend the energy. Muscles swell, giving rise to headaches, a stiff neck and that awful feeling of your chest being squeezed.

To ensure the muscles have an adequate blood supply, cortisol diverts blood away from the digestive system. This can cause tummy trouble such as cramps, diarrhea or appetite loss.

When stress hormones run rampant, the immune system can struggle, increasing vulnerability to bugs and illnesses. Hence the common ‘break-up cold’.

There is a steady release of cortisol. This might cause sleep problems and interfere with the capacity to make sound judgements

Breakups activate the area of your brain that processes craving and addiction. Losing a relationship can throw you into a type of withdrawal, which is why it’s hard to function – you ache for your ex, sometimes literally, and can’t get him/her out of your head. Like any addiction, this will pass.

In a relationship, your mind, your body and the core of you adjust to being intimately connected someone. When that someone leaves, the brain has to readjust. The pain can be relentless but eventually the body chemistry will change back to normal and the hurt will diminish.

Getting through a breakup is as much a physical process as an emotional one. Remember that, and know that it will get easier. Keep going. You’ll get there.