By Gabriella Kelly-Davies, PNN Columnist

Anyone who lives with chronic pain knows it can affect their emotions. Every morning when I wake with a migraine, I feel a sense of doom. My heart races and I panic about how I will cope with everything that lies ahead of me that day — the meetings, deadlines and responsibilities, not to mention family and social commitments that often end up taking a back seat as I scramble to find ways of simplifying my day.

After decades of living with chronic migraine, I now know these emotions intensify my experience of pain. Having said this, I know it is not “all in my head” as some might claim, but part of a complex interaction between my emotions and the way my central nervous system incorrectly processes pain signals.

Exciting new Australian research using sophisticated brain imaging is shedding new light on what happens at an emotional level for people living with chronic pain.

Chemical “messengers” known as neurotransmitters facilitate communication between brain cells. Some neurotransmitters are inhibitory, helping to dial down our emotions, while others are excitatory and increase the intensity of emotions. A molecule known as γ-aminobutyric acid or GABA is the main inhibitory neurotransmitter.

Neuroscientist and psychologist Sylvia Gustin, PhD, discovered that GABA levels are lower in people with chronic pain and this affects their ability to regulate their emotions. The link between lower levels of GABA and chronic pain had been shown in animal studies, but Gustin’s research, recently published in the European Journal of Pain, is the first time it has been demonstrated in humans.

“A decrease in GABA means our brain cells can no longer communicate with each other properly,” explained Gustin, an associate professor at the University of Sydney’s School of Psychology. “When there’s a decrease in GABA, it makes it harder to keep emotions such as fear, worry, anxiety and depression in check.”

Gustin’s research shows there’s a physical change in the central nervous system that helps explain the roller coaster of emotions people living with pain often experience.

“If you live with chronic pain, it’s important to remember it’s not you -- there’s something physically happening to your brain. We don’t yet know why this happens, but we’re working on finding solutions on how to change it,” Gustin told me.

Her research confirms that chronic pain, which affects one in five people worldwide, is more than just an uncomfortable sensation. “It can affect our feelings, beliefs and the way we are,” she says. “Almost half the people living with chronic pain also experience major anxiety and depression disorders.”

GABA is not the only neurotransmitter that behaves differently in people living with chronic pain. In an earlier study, Gustin and her colleagues found levels of the main excitatory neurotransmitter in the central nervous system – glutamate -- are also lower in people with chronic pain. Lower glutamate levels are linked to increased feelings of fear, worry and negative thinking. They disrupt how brain cells talk to each other, affecting the ability to feel positive emotions such as happiness, motivation and confidence.

“My research results are reassuring for people living with pain because they show that physical changes in the brain are contributing to anxiety and depression and it’s not a person’s fault they struggle with these emotions,” Gustin said.

Her research team recently developed and tested an online recovery program that teaches people skills to help modify negative emotions such as fear, worry, anxiety and depression. The program helps to address the neurotransmitter disruption in chronic pain.

“Online programs offer hope to people living with disabilities or those in rural and remote communities who often struggle to access pain management services,” she said. “Online programs are also ideal during COVID-19 lockdowns.

“We know that chronic pain is always present, and we can’t get rid of it. But we can change the way we experience it by learning new skills. Like all skills, it takes practice to master it, but we hope it will offer another tool for people to change the way they experience pain.”

Gustin says preliminary results of this research, which will be published in a few months, are encouraging. Several organizations, including Australia’s National Health and Medical Research Council and Medical Research Future Fund, the International Association for the Study of Pain (IASP) and the U.S. Department of Defense, are helping to fund her work. To learn more about this research, click here.

Gabriella Kelly-Davies lives with chronic migraine.  She is the author of “Breaking Through the Pain Barrier,” a biography of trailblazing Australian pain specialist Dr. Michael Cousins. Gabriella is President of Life Stories Australia Association and founder of Share your life story.