If you live with chronic pain and find yourself eating in a way you cannot seem to control, you are not simply lacking willpower. In this piece, Dr. Padda explains the real connection between pain and addictive eating—a loop built on dopamine, the brain’s reward and learning signal. Understanding it helps explain why so many people with pain also struggle with weight and metabolic health, and everything below comes from his talk.
The pleasure loop your brain is built to reinforce
Humans are hardwired to seek pleasure—it is what drives us to act rather than sit still. Eating triggers a release of dopamine, and dopamine is a learning signal: it tells your brain “that was good, do it again.” For most of history the foods that gave us that reward were also the most nutritionally dense, so the loop kept us healthy. The brain repeats what feels rewarding, reinforcing the behavior each time.
How processed food hijacks the same reward system
Modern food companies, Dr. Padda explains, have engineered products to hijack that dopamine system. A bag of chips can taste amazing without carrying real nutritional value—so you cannot stop at one. He defines processed food as food manipulated until it no longer resembles anything in nature: high-fructose corn syrup, added carbohydrate, artificial sugars, and vegetable oils your tongue cannot even detect as rancid. The result is powerful reinforcement to keep eating foods that reward the brain but do not nourish the body.
Why pain pushes people toward substitution
Here is the link to pain. Anything that hits the dopamine reward system—including some pain medications—creates the same drive. When a person cannot access whatever was giving them that dopamine release, they often substitute something else that delivers a similar hit, and food is the most available option. That is why, Dr. Padda notes, many people with severe pain overeat. He adds that triggers such as environment, relationships, and especially loneliness feed this loss of control, describing loneliness as sitting at the base of addiction itself.
What this means at the Padda Institute
This connection has real metabolic consequences. Dr. Padda states that only about 7% of the U.S. population is metabolically healthy, that the figure is under 1% in the pain population, and that in his own clinic’s studies it works out to roughly 0.1% of patients arriving metabolically healthy—figures he reports from practice, so individual results vary. That is why care here looks past the pain alone to the eating patterns, triggers, and isolation driving it. He also points to a dedicated resource, addictionology.center, focused specifically on the many factors behind addiction.
Frequently asked questions
Why do I overeat when my pain is bad?
According to Dr. Padda, both food and some pain treatments release dopamine, the brain's reward and learning signal. When the source of that reward is unavailable, the brain drives you to substitute something that gives a similar hit, and food is usually the easiest option. This is a wiring issue, not a simple failure of willpower, and triggers like stress and loneliness make it stronger. Individual results vary.
What counts as processed food?
Dr. Padda defines processed food as anything manipulated so heavily that it no longer resembles something found in nature. That includes added vegetable oils, high-fructose corn syrup, extra or artificial sugars, and calorie-dense ingredients that trigger dopamine release without delivering real nutrition. These foods are engineered to keep you eating, which is why one chip becomes the whole bag.
Could my pain medication be linked to my eating?
Dr. Padda explains that pain medications act on the same dopamine reward system as food, so losing access to them can drive substitution with overeating. Do not start, stop, or change any medication without consulting your physician; any change should be made with your doctor as part of a plan that also addresses the underlying pain and eating patterns. Individual results vary.
Where are you located and how do I book?
Padda Institute Center for Interventional Pain Management, 4477 Woodson Rd, Suite 100, St. Louis, MO 63134. Book at painmd.tv/appointment/ or call (314) 481-5000.
Key takeaways
- Mechanism: eating releases dopamine, a learning signal that reinforces the behavior—the same system pain and pain medications engage.
- Evidence status: a clinical, practice-based explanation Dr. Padda uses; reported metabolic-health figures are practice observations.
- Why timing matters: when a dopamine source is lost, the brain substitutes food, driving overeating and metabolic decline.
- Next step: address the eating, triggers, and pain together—book at painmd.tv/appointment/.
Medically reviewed by Dr. Gurpreet Singh Padda, MD, MBA, MHP — Board Certified in Anesthesiology, Pain Medicine, Interventional Pain Management, Addiction Medicine, and Obesity Medicine. Last reviewed July 2026.
This article is educational and is not a substitute for evaluation, diagnosis, or treatment by a physician. Individual results vary. Do not start, stop, or change any medication without consulting your physician.
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Dr. Gurpreet Singh Padda, MD, MBA, MHP
