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20 Side Effects of Stress That You Didn’t Know Are Ruining Your Health

Updated on July 29, 2025 by TMM Staff · Fitness, Lifestyle

A man in a suit with his head in his hands at a desk.
©Getty Images/Unsplash.com

Stress is a master of disguise. It creeps in during traffic jams, long meetings, late-night emails, then quietly rewires how the body works. Most people associate stress with a racing heart or clenched jaw, but that’s barely scratching the surface.

The truth is that chronic stress can throw a wrench into just about every system in the body. It doesn’t always shout. Sometimes, it whispers through weird aches, foggy thoughts, or cravings that come out of nowhere. Here’s what stress might be doing right under your nose.

Table of Contents

Toggle
  • 1. Thinning hair that sheds like crazy
  • 2. Junk food cravings that feel impossible to resist
  • 3. Random chest tightness or fluttering
  • 4. Skin breakouts
  • 5. Grinding teeth during sleep
  • 6. Brain fog that makes basic tasks feel impossible
  • 7. Back pain that just won’t go away
  • 8. Sleep that’s always just out of reach
  • 9. Weird digestive drama at the worst times
  • 10. Eye twitching that makes you feel like you’re losing it
  • 11. Libido that flatlines for no reason
  • 12. Immunity problems
  • 13. Voice that sounds tight
  • 14. Sweating randomly
  • 15. Hands or feet that always feel cold
  • 16. Memory lapses that leave you blanking out
  • 17. Sudden weight shifts
  • 18. Persistent jaw tension
  • 19. Breathing that feels too shallow
  • 20. Mood swings that catch everyone off guard

1. Thinning hair that sheds like crazy

A bearded man in a robe touching his hair while looking in a mirror.
©Mesut çiçen/Unsplash.com

Losing a few strands here and there? Sure. But stress can crank that dial way up. Telogen effluvium is the technical term, but it really just means your hair skips the growing phase and heads straight for the exit.

Especially for guys, it can feel like stress is fast-tracking hair loss. Add in lifestyle changes and aging, and the effect doubles down. The worst part is you might not even connect the dots until months later.

2. Junk food cravings that feel impossible to resist

A bowl of ridged potato chips.
©Markus Winkler/Unsplash.com

Suddenly needing salty chips or a midnight donut? That could be cortisol playing games. This stress hormone pushes the body to refuel with quick-hit calories, especially ones packed with sugar and fat.

Oddly enough, those cravings rarely fix anything. They give a temporary high, then crash just as fast. But the pattern is hard to break once it sets in.

3. Random chest tightness or fluttering

A man clutching his chest.
©Curated Lifestyle/Unsplash.com

That heavy feeling in the chest is often a good indicator of stress. Sometimes it feels like pressure. Other times, like heart flutters or skipped beats. It’s unsettling, to say the least.

Thing is, stress doesn’t only live in the mind. It plants roots in the body, especially around the heart. While most stress-induced chest sensations aren’t dangerous, they sure feel like a red flag.

4. Skin breakouts

A man washing his face at a sink.
©Getty Images/Unsplash.com

Adult acne is real, and stress often lights the fuse. Increased cortisol triggers oil production, which clogs pores and creates the perfect storm for breakouts.

Men can be blindsided by this one. One week, the skin’s clear, the next it’s throwing a tantrum. Stress doesn’t ask for permission. It just shows up on the face.

5. Grinding teeth during sleep

A person lying face down on a bed beside a smartphone.
©Getty Images/Unsplash.com

Waking up with a sore jaw or tension headache? Chances are, the stress is getting to you after hours. Bruxism, grinding or clenching, often kicks in when the mind’s racing but the body’s trying to sleep.

Sometimes people don’t even know they’re doing it until their dentist points it out. By then, the damage might be starting. Cracks, sensitivity, jaw pain, the whole deal.

6. Brain fog that makes basic tasks feel impossible

A man at a desk with hands on their face in front of computer monitors.
©Getty Images/Unsplash.com

Simple things like remembering appointments or finishing an email can feel way harder under stress. The brain just doesn’t fire on all cylinders when it’s dealing with overload.

It’s like trying to think through a cloud. Attention slips. Focus drifts. And frustration climbs. Not exactly a productivity booster.

7. Back pain that just won’t go away

A person holding their lower back while standing by gym equipment.
©Curated Lifestyle/Unsplash.com

Stress messes with posture, muscle tension, and even how pain is perceived. The lower back tends to catch the brunt of it. Long hours at a desk? That doesn’t help either.

The catch? It’s not just physical. Emotional strain often makes existing discomfort feel worse. The body holds onto stress in ways most people don’t expect.

8. Sleep that’s always just out of reach

A close-up of rumpled dark gray bed sheets and a pillow.
©Lala Azizli/Unsplash.com

Falling asleep becomes a battle. Staying asleep? Even tougher. Stress hijacks sleep cycles, especially when the brain keeps spinning long after bedtime.

Guys often try to “power through” it, thinking they’ll crash eventually. But poor sleep stacks up fast, messing with everything from mood to metabolism.

9. Weird digestive drama at the worst times

A man sitting on a bed clutching his stomach.
©Getty Images/Unsplash.com

Stress doesn’t just sit in the chest or head. It drops straight into the gut as well. Cramps, bloating, or unpredictable bathroom habits are all part of the stress-gut axis.

Meals that used to go down easily suddenly feel like a gamble. The gut and brain are more connected than most people realize, and stress knows exactly how to pull those strings.

10. Eye twitching that makes you feel like you’re losing it

A man applying eye drops to his eye.
©Getty Images/Unsplash.com

That annoying flutter in one eyelid is often stress-related. It’s harmless, sure, but ridiculously irritating. Especially when it refuses to stop.

Caffeine and screen time can make it worse. But the real culprit is usually hidden tension. The body tries to stay composed, and tiny muscles get overloaded in the process.

11. Libido that flatlines for no reason

A couple sitting on a bed holding pillows.
©Process AG/Unsplash.com

High stress levels mess with testosterone, blood flow, and energy. The result? Bedroom performance might take a nosedive, often without warning.

It’s not just physical. Mental pressure adds another layer. Stress isn’t sexy and when the mind’s not on board, the body usually follows.

12. Immunity problems

A man sneezing into a tissue outdoors.
©Andrej Lišakov/Unsplash.com

Ever notice how colds hit harder during tough weeks? Stress puts the immune system on the back burner. It focuses resources on fight or flight mode instead of defense.

Recovery slows down, and small bugs linger longer than usual. It’s like the body’s defenses are running on fumes.

13. Voice that sounds tight

A man coughing into his elbow with his hand raised.
©Towfiqu barbhuiya/Unsplash.com

Tension in the neck and shoulders can creep up into the throat. Stress affects how the voice sounds, making it thinner, scratchier, or oddly tight.

Some people even lose their voice during heavy stress episodes. The muscles involved in speech tighten up like they’re bracing for impact.

14. Sweating randomly

A sweaty man shielding his eyes from the sun.
©Natalia Blauth/Unsplash.com

Random sweating, even when the room’s cool, is a classic stress giveaway. It’s the body’s way of prepping for a non-existent emergency.

It tends to hit at weird times like meetings, traffic, and awkward conversations. The sweat comes first. The panic follows. Not a great combo.

15. Hands or feet that always feel cold

A pair of feet in white socks on a bed.
©Livi Po/Unsplash.com

Blood flow gets rerouted during stress, pulling away from extremities. So the hands or feet might feel weirdly chilly, even in warm rooms.

It’s one of those signs that’s easy to miss. But over time, the pattern becomes noticeable, especially when stress sticks around.

16. Memory lapses that leave you blanking out

A man holding his head in his hands at a table.
©Andrej Lišakov/Unsplash.com

Forgetting names, dates, or where the car’s parked, stress messes with short-term memory in sneaky ways. High cortisol levels affect the brain’s hippocampus, which handles recall.

The impact can be mild or downright frustrating. Either way, it’s a sign that the mental load might be heavier than expected.

17. Sudden weight shifts

A pair of bare feet standing on a digital scale.
©i yunmai/Unsplash.com

Some pack on pounds. Others drop weight fast. Stress has different effects on metabolism and neither feels great.

Appetite swings play a big role. So does sleep, cortisol, and daily habits. One thing’s for sure, stress changes how the body stores and uses energy.

18. Persistent jaw tension

A man touching his chin while looking in a mirror.
©Getty Images/Unsplash.com

Ever find yourself clenching your jaw without realizing it? That tightness can stick around all day, especially during stressful periods.

It builds slowly. Over hours, it can lead to headaches, facial pain, or even earaches. It’s one of those stress signs that wears a really good disguise.

19. Breathing that feels too shallow

A man sleeping under a blanket.
©Getty Images/Unsplash.com

Stress shifts breathing into the chest instead of the diaphragm which makes your breathing quicker, more shallow, and sometimes panicky.

The body’s basically prepping for action even when there’s nothing happening. It’s a physiological trick that can leave you feeling breathless for no reason at all.

20. Mood swings that catch everyone off guard

A man holding his head in his hands.
©Malachi Cowie/Unsplash.com

One minute you’re fine, the next minute you’re irritated or drained. Emotional whiplash often points to stress bubbling under the surface. It eats away at patience and ramps up reactions.

Men are sometimes told to tough it out, but internalizing stress only makes those mood shifts sharper. The weight builds until something gives.

Fitness, Lifestyle Everlane

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About TMM Staff

The Modest Man staff writers are experts in men's lifestyle who love teaching guys how to live their best lives.

If an article is published under TMM Staff, that means multiple writers worked on it. For example, sometimes several of us have experience with a certain brand, so we collaborate to publish a more thorough review.

Or, if an article was originally written by one person, but then it was updated by someone else, we'll re-publish it under TMM Staff.

Remember: all of our articles (including those below) are written by real people with decades of combined experience in men's fashion and lifestyle topics.

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