How Stress Affects the Brain and How to Manage It After 50

Key takeaways

• Short-term stress is a normal response that can help you react to anything that’s challenging you in the moment.

• Chronic stress keeps the brain and nervous system on alert longer than intended.

• Cortisol is one stress-related hormone, but there is no single “stress chemical” in the brain.

• Ongoing stress can affect attention, memory, sleep, decision-making and emotional regulation.

• Movement, sleep, breathing exercises, routines and social connection can all be part of a practical stress-management plan.

• Persistent memory, mood or concentration changes should be discussed with your doctor.

How does stress affect the brain and nervous system?

Stress activates systems in the brain and body that prepare you to respond to something difficult, uncertain or threatening. Your heart may beat faster, your breathing may quicken and your muscles may tense. Your attention also shifts toward the immediate problem while less urgent tasks move into the background.¹

That response isn’t always harmful. A brief burst of stress can help you meet a deadline, react quickly or work through a demanding situation.

The concern is ongoing stress that keeps your brain and nervous system on alert without enough time to recover. Mutual of Omaha vice president and medical director Dr. Tammy Lovette, MD, ABFM, explains “Chronic stress leads to the body releasing excess cortisol, the hormone involved in the fight-or-flight response.” Over time, this may affect sleep, mood, concentration, appetite and physical health.¹˒²

What is the difference between acute and chronic stress?

Acute stress is short term. It may appear before an important conversation, during a difficult drive or when an unexpected problem needs your attention. The response usually settles after the situation passes.

Chronic stress continues over a longer period or returns so often that the body has little time to reset. Work pressure, caregiving, health concerns, financial uncertainty and changes in family responsibilities can all contribute. Chronic stress can affect sleep, appetite, mood, energy, concentration and decision-making.¹˒²

Is cortisol the stress chemical in the brain?

Cortisol and adrenaline (also known as epinephrine) are two hormones involved in the stress response, but there is no single “stress chemical” in the brain. Neurotransmitters, immune signals and several areas of the brain also take part.³

Cortisol is not harmful by itself. It helps the body make energy available and respond to a challenge. Problems can develop when the stress response stays activated or becomes difficult to regulate. Learning what cortisol does in the body can help put these changes in context.

How stress may affect memory, focus and the body

Stress doesn’t affect only one part of the brain. It changes communication among areas involved in detecting threats, forming memories, directing attention and managing emotional responses.³˒⁴

These areas work as connected systems rather than isolated switches. A headache, concentration problem or poor night of sleep doesn’t prove that stress is the cause. Medications, sleep disorders and other health conditions can produce similar symptoms.

How to recognize when stress is affecting you

Chronic stress may feel less like a sudden crisis and more like never fully relaxing. Dr. Lovette highlights that “chronic stress can make it harder to focus, learn and remember.”

Seven common warning signs include:

1. Trouble concentrating. Reading, planning or following a conversation may require more effort.

2. Forgetfulness. You may lose track of an appointment, a name or why you entered a room.

3. Sleep changes. Falling asleep, staying asleep or waking refreshed can become more difficult.

4. Irritability or worry. Small problems may feel harder to handle than usual.

5. Headaches or muscle tension. Stress can show up physically in the head, neck, shoulders or jaw.

6. Changes in energy or appetite. You may feel tired, restless, less hungry or more likely to eat for comfort.

7. Changes in behavior. Withdrawing from other people or relying more heavily on alcohol, tobacco or other substances can be a sign that stress is becoming harder to manage.¹˒²

How do you know if stress is affecting your brain?

Look for patterns rather than one isolated symptom. Stress may be playing a role when problems with focus, sleep, mood or memory become more noticeable during demanding periods and ease when you have time to rest.

Consider what has changed recently:

• Are you handling more work or caregiving responsibilities?

• Are worries continuing into the evening?

• Has your sleep schedule changed?

• Are you skipping meals, movement or time with other people?

• Are you constantly checking email, news or social media?

• Do you feel as though you are reacting all day rather than making deliberate choices?

Stress is only one possible explanation. New or worsening memory problems, confusion, balance changes or difficulty completing familiar tasks should not automatically be dismissed as stress or aging. Talk with your doctor so other causes can be considered.

6 ways to break the cycle of chronic stress

There is rarely one thing you can do that removes every source of stress. A more practical goal is to reduce stress where you can and give your brain regular opportunities to move out of high-alert mode.

In the 2026 Mutual of Omaha Aging Well Survey, 43% of adults age 50 and older said they manage stress through activities such as deep breathing or meditation at least once a week to support brain health. At the same time, 32% said stress gets in the way of taking care of their brain health.*

Start with the part of the cycle you can influence today.

1. Identify what is keeping your brain on alert

Naming your stressors can make a large problem feel more manageable and help you focus on what you can control.

Try this: Write down what has been taking your attention. Sort each concern into one of three groups:

• Something you can act on now

• Something you can plan for later

• Something outside your control

This won’t make a difficult situation disappear, but it can reduce the mental effort of trying to solve everything at once.

Work and family demands often overlap during midlife. Caring for an older parent, supporting adult children and preparing for retirement may all compete for time. Clearer work-life boundaries can help create room for rest without requiring you to step away from every responsibility.

2. Give your nervous system a brief pause

Slow, comfortable breathing may help interrupt the feeling that every problem requires an immediate response. You don’t need a long meditation session or a perfectly quiet room.

Try this simple reset:

• Sit or stand somewhere comfortable.

• Let your shoulders drop.

• Breathe in slowly through your nose.

• Exhale a little longer than you inhaled.

• Repeat for one to five minutes.

A five-minute mindfulness exercise can also fit between meetings, before an appointment or after a difficult conversation.

3. Move in a way you can repeat

Physical activity can reduce short-term feelings of anxiety and support thinking, memory and sleep. Even a small amount of movement can be useful, and it does not have to happen all at once.⁵

A practical starting point might be:

• A walk after lunch

• Gardening for 10 minutes

• Stretching while watching television

• Riding a bike

• Taking an exercise class with a friend

• Doing household tasks at a steadier pace

Choose something that fits your current health and ability. Talk with your doctor before beginning a new exercise routine, especially if you have a chronic condition, pain, balance concerns or have not been active recently.

4. Make sleep easier to reach

Stress and sleep can reinforce each other.

Worry makes it harder to rest, and poor sleep can make it more difficult to concentrate and manage stress the following day.

Try this:

• Stop working at a consistent time.

• Lower the lights before bed.

• Put your phone on sleep mode.

• Go to bed and wake up at consistent times.

• Avoid using alcohol as a sleep aid.

A consistent routine signals that the active part of the day is ending. Dr. Lovette advises avoiding sleep medications once you reach a certain age. She adds, “As a general rule, I would discourage over-the-counter sleep medication in anyone over about 60 years old. Certain active ingredients in cold medications and sleep aids can cause confusion, falls and urinary retention, especially in older folks.”

5. Use routines to reduce mental overload

A routine gives your brain fewer decisions to make when your attention is already stretched. Written reminders and regular schedules also reduce the pressure to hold every detail in your memory.

Dr. Lovette says, “A routine can help you feel more in control because there is more stability and less chaos in your day.”

Useful routines might include:

• Planning meals before the week begins

• Keeping medications in one consistent location

• Writing tomorrow’s priorities before ending the workday

• Setting regular times for movement and sleep

• Using one calendar for health, work and family commitments

The goal is not to make everyday rigid. It is to save attention for the decisions that truly require it.

6. Stay connected to other people

Stress often grows when it stays private. Talking with someone you trust can help you name what is happening, consider another perspective or ask for practical help.

Connection can be simple:

• Call a friend during a walk

• Share caregiving tasks with a family member

• Join a class or community group

• Schedule regular time with someone who helps you feel grounded

• Talk openly with your doctor about how stress is affecting daily life

You do not have to wait until stress becomes overwhelming to ask for support.

Can your brain recover from chronic stress?

Problems with sleep, focus and memory related to stress may improve when stress decreases and supportive routines return. Recovery varies from person to person, and ongoing stress doesn’t mean every person has permanent brain damage.

Chronic stress has been associated with changes in brain activity, function and communication. However, the phrase “brain damage from stress” is broader and more alarming than the science supports for most people.³˒⁴

Recovery may involve a combination of:

• Reducing or changing the source of stress where possible

• Improving sleep

• Returning to regular movement

• Reconnecting with other people

• Addressing anxiety, depression or burnout

• Reviewing medications and health conditions with a doctor

• Working with a mental health professional when needed

Talk with your doctor if problems with memory, concentration or mood continue after a stressful period has passed. Stress, medication effects, sleep disorders, thyroid conditions, vitamin deficiencies, depression and other health issues can produce similar symptoms.

When to talk with your doctor about stress

Make an appointment when stress:

• Continues for weeks and is not easing

• Interferes with sleep, work or relationships

• Makes it difficult to complete familiar tasks

• Causes frequent headaches, stomach problems or physical tension

• Leads to increased alcohol, tobacco or substance use

• Comes with persistent anxiety, sadness or loss of interest

• Is accompanied by new or worsening memory changes

Your doctor can help look for physical or mental health factors that may be contributing. They can also discuss counseling, medication or other forms of support when appropriate.

Seek immediate medical care for sudden confusion, weakness on one side of the body, difficulty speaking, severe chest pain or trouble breathing. Those symptoms should not be assumed to be stress.

Frequently asked questions about stress and the brain

What does chronic stress feel like?

Chronic stress can feel like being tense, tired or mentally overloaded for a long period. Common signs include trouble sleeping, difficulty concentrating, forgetfulness, irritability, headaches, appetite changes and feeling unable to relax.¹˒²

What are seven warning signs of stress?

Seven common signs are trouble concentrating, forgetfulness, sleep problems, irritability, headaches or muscle tension, changes in appetite or energy, and withdrawing from people or relying more on alcohol or tobacco.

How can you break the cycle of chronic stress?

Start by identifying your main stressors and choosing one action you can control. Brief breathing exercises, regular movement, consistent sleep, simple routines and talking with someone you trust can all help create periods of recovery.²

Can stress cause brain damage?

Chronic stress can be associated with changes in brain activity, function and communication, but “brain damage” is too broad to describe what happens to every person under stress. These changes are not always permanent, and symptoms can have many causes.³˒⁴

Can your brain recover from stress?

Focus, sleep and memory problems related to stress may improve when stress decreases and supportive routines return. Recovery varies, and persistent symptoms should be discussed with your doctor.⁴

Does stress show on a brain scan?

Researchers can use tools such as functional MRI, PET scans and EEG to study how the brain responds to stress.⁶˒⁷ However, a routine brain scan does not diagnose everyday stress, and these measurements are used mainly in research or specialized clinical settings.

Sources:

*Mutual of Omaha Aging Well Survey. Mutual of Omaha worked with research vendor quantilope to conduct a five-minute online survey of 400 adults age 50 and older with an annual household income of $50,000 or more. Research was conducted June 17-21, 2026. All survey data cited in this article is based on Mutual of Omaha proprietary research unless otherwise noted.

1. World Health Organization, Stress, March 30, 2026, accessed July 2026. https://www.who.int/news-room/questions-and-answers/item/stress

2. Centers for Disease Control and Prevention, Managing Stress, May 12, 2026, accessed July 2026. https://www.cdc.gov/mental-health/living-with/index.html

3. National Library of Medicine, Mechanisms Underlying Stress Effects on the Brain: Basic Concepts and Clinical Implications, 2025, accessed July 2026. https://pubmed.ncbi.nlm.nih.gov/40222781/

4. National Library of Medicine, Chronic Stress-Induced Neuroplasticity in the Prefrontal Cortex: Structural, Functional, and Molecular Mechanisms From Development to Aging, 2025, accessed July 2026. https://pubmed.ncbi.nlm.nih.gov/39864644/

5. Centers for Disease Control and Prevention, Physical Activity Boosts Brain Health, Aug. 13, 2025, accessed July 2026. https://www.cdc.gov/physical-activity/features/boost-brain-health.html

6. National Library of Medicine, Brain Network Dynamics Following Induced Acute Stress: A Neural Marker of Psychological Vulnerability to Real-Life Chronic Stress, July 7, 2025, accessed July 2026. https://pubmed.ncbi.nlm.nih.gov/40621712/

7. Ohio State Health & Discovery, Identifying Mental Health Disorders Before They Emerge, May 26, 2026, accessed July 2026. https://health.osu.edu/health/mental-health/measuring-mental-health-brain-biomarkers