How ongoing stress impacts the body

Most of us have a sense of when stress is building — a pounding heart, a stomach that turns before a tough conversation or a night spent awake because our thoughts will not settle down.

Yet stress is not always so easy to spot. It can show up as irritability, leaving us more on edge than usual, or as feeling overwhelmed by things that normally would not bother us. For some people, it appears as recurring digestive trouble or the habit of reaching for a drink at the end of the day just to unwind.

And sometimes there is no clear outward clue at all. We can get so used to that constant background pressure that we stop noticing it, even though our bodies are still responding to it.

Stress Is Not Always Harmful

A certain amount of stress can be useful. Pressure and deadlines may help sharpen focus, increase creativity and improve efficiency.

When the brain senses a threat or challenge, it sets off the familiar fight-or-flight response. Adrenaline and cortisol rise, the heart beats faster, blood pressure increases, breathing speeds up and glucose and fats are released into the bloodstream for energy. Long ago, this reaction helped people confront danger or escape it.

Today, the stressors are different, but the body often reacts in the same way. Instead of running or fighting, we usually sit with that tension for long periods.

What Happens in the Body

The digestive system offers one of the clearest examples of how stress affects us.

The brain and gut are in constant communication through the gut-brain axis. Stress can change how quickly food moves through the digestive tract, make the gut more sensitive, weaken the intestinal barrier and even alter the balance of microbes living there.

That can lead to reflux, nausea, bloating, stomach pain, constipation or diarrhea. For people with irritable bowel syndrome, stress can make symptoms worse.

The cardiovascular system is affected as well. A faster heart rate and higher blood pressure are helpful when escaping danger, but much less useful while sitting in traffic or working at a computer.

Over time, that stress response can wear the body down. Chronic stress is linked to high blood pressure and may raise the risk of heart attack and stroke. It can also worsen anxiety and depression, weaken immune function, contribute to neck and back pain and trigger tension headaches and migraines.

Stress can also interfere with sleep, making it harder to fall asleep or stay asleep. In turn, poor sleep makes it more difficult to manage stress, creating a cycle in which even ordinary pressures feel overwhelming.

How We Manage It Matters

Some sources of stress are beyond our control, including a medical diagnosis, grief, caring for a loved one, financial strain or a demanding period at work. In those situations, it may feel impossible to change or reduce the pressure.

What we can influence is how we respond and how often we give the body a chance to step out of fight-or-flight mode. That can look different for everyone:

• Move. Exercise, take a walk, do yoga or spend time gardening — anything that gets you active.
• Create. Paint, cook, work on a puzzle or play an instrument — anything that shifts your attention for a while.
• Connect. Spend more time with people who make you feel better after being around them.
• Protect sleep. Stress disrupts sleep, and poor sleep makes stress harder to handle. Do what you can to preserve both the quality and length of your rest.
• Find a reset. Breathing exercises, time outdoors or even a few minutes away from technology can help calm the nervous system.

Pay attention to your body’s warning signs that stress may be building more than you realize. Even if you cannot always change what is causing it, recognizing its effects can help you respond in healthier ways.