Can Stress Cause Gut Problems?

Understand Your “Nervous Stomach”

Your Body Has a Switchboard

Your body has an internal control system called the autonomic nervous system. It has two main divisions, each with its own set of nerves and chemical messengers.

The first is the sympathetic system. This is your “fight or flight” response. When it kicks in, you get a surge of adrenaline. Your body pumps blood to your muscles and heart so you can face a threat or run from one. Some people get stuck in this mode. Their body stays on high alert all the time. It is very hard to digest food when you are in this state.

The second is the parasympathetic system. This is what we call “rest and digest.” This is the mode where healing happens. This is where your body does its best work breaking down food and absorbing nutrients.

The Seesaw Effect

Here is the key. These two systems work like a seesaw. When one goes up, the other comes down.

So when stress takes over and fight or flight is running the show, your digestion shuts down. Blood flow shifts away from your gut. The movement of food slows to a crawl. You stop making the enzymes you need.

That is why a stressful day often leads to bloating, nausea, or that heavy feeling like a brick sitting in your stomach. Your body cannot digest food while it thinks it is fighting a tiger.

The Detective Question

So I have to ask you something important.

How much of your gut discomfort is actually coming from your stress levels? Could the real key to fixing your digestion be calming your nervous system?

Pay attention to the pattern. Does your gut act up when your stress goes up? If it does, the answer might not be a new supplement or a new diet. It might be learning how to switch your body back into rest and digest mode.

That is where healing begins.

Authored by Gerard Guillory, MD

Gerard Guillory, MD, is a board-certified internist who practiced for nearly four decades with a focus on functional, root-cause medicine. He is the author of three books on irritable bowel syndrome and the founder of It’s My Health, where he and his team put current health news in context and help members understand the underlying causes of chronic symptoms.