Why Am I So Tired?

You hit snooze for the third time. You’ve had a full night’s sleep — at least on paper — but drag­ging your­self out of bed still feels like a Her­culean task. Sound famil­iar? You’re not imag­in­ing it.

Fatigue is one of the most com­mon com­plaints providers hear, and it’s more than just feel­ing sleepy. The CDC esti­mates that about 1 in 3 Amer­i­can adults isn’t get­ting enough sleep reg­u­lar­ly — and with the rise of screen time, hybrid work sched­ules, and always-on cul­ture, that num­ber has­n’t improved.

So what’s actu­al­ly going on? And more impor­tant­ly, what can you do about it? Let’s break it down.

What Is Fatigue, Really?

We all have tired days, but fatigue is some­thing dif­fer­ent. It’s char­ac­ter­ized by per­sis­tent low ener­gy, dif­fi­cul­ty start­ing tasks, and feel­ing wiped out even after sim­ple activ­i­ties. The Nation­al Insti­tutes of Health (NIH) describes sleep depri­va­tion as a con­di­tion that impairs cog­ni­tion, mood, and phys­i­cal health, with effects that com­pound over time.

Fatigue can be phys­i­cal or men­tal. Men­tal fatigue — the brain fog that comes from pro­longed screen use, deci­sion fatigue, or emo­tion­al stress — is increas­ing­ly com­mon in our noti­fi­ca­tion-heavy world. When your brain is run­ning on over­drive, your body pays the price. The good news: most caus­es of fatigue are address­able. Here’s where to start.

The Basics of Good Sleep Hygiene

Sleep hygiene sounds clin­i­cal, but it’s real­ly just a set of habits that help you wind down and wake up feel­ing like your­self. Research from the Amer­i­can Acad­e­my of Sleep Med­i­cine rec­om­mends that adults get at least 7 hours of sleep per night for opti­mal health, and the qual­i­ty of that sleep mat­ters just as much as the quantity.

A few changes to your evening rou­tine can make a sur­pris­ing­ly big difference:

• Set a con­sis­tent bed­time. Your brain loves rou­tine. Going to bed at the same time every night (yes, even on week­ends) helps reg­u­late your cir­ca­di­an rhythm, mak­ing it eas­i­er to fall and stay asleep.
• Build a wind-down rit­u­al. Whether that’s read­ing, a warm bath, or light stretch­ing, your brain starts asso­ci­at­ing those activ­i­ties with sleep over time. The key is consistency.
• Cool your room down. Aim for some­where between 60 and 66 degrees Fahren­heit. Your core body tem­per­a­ture needs to drop slight­ly to ini­ti­ate sleep, and a cool­er room helps that process along.
• Dim the lights after dark. Light sup­press­es mela­tonin pro­duc­tion. Switch­ing to warm, low­er light­ing in the evening sig­nals to your body that it’s time to rest.
• Get morn­ing sun­light. Even 20 min­utes of nat­ur­al light in the morn­ing can anchor your body’s inter­nal clock, help­ing you feel more alert dur­ing the day and sleepy at the right time at night.
• Skip the night­cap. Alco­hol might help you fall asleep faster, but it frag­ments your sleep qual­i­ty and reduces the time you spend in restora­tive REM sleep — leav­ing you more tired, not less.
• Cut caf­feine by ear­ly after­noon. Caf­feine has a half-life of about 5 to 6 hours, mean­ing a 3PM cof­fee can still be active in your sys­tem at bed­time. Try mak­ing 1PM your cutoff.
• Avoid late-night eat­ing. Eat­ing with­in 2 to 3 hours of bed can cause blood sug­ar fluc­tu­a­tions that dis­rupt sleep. A light, ear­ly din­ner is your best bet.

Ready to improve your sleep? Sched­ule an appoint­ment with a Duly Inter­nal Med­i­cine provider to dis­cuss a per­son­al­ized plan. >

Every­day Habits That Fight Fatigue

Sleep is the foun­da­tion, but what you do dur­ing the day shapes how well you sleep at night — and how you feel in between. Small adjust­ments add up faster than you might think.

Hydrate More Than You Think You Need To

Dehy­dra­tion is one of the most over­looked caus­es of day­time tired­ness. Even mild dehy­dra­tion — before you feel thirsty — can impair focus and ener­gy lev­els. Aim for 8 to 10 glass­es of water dai­ly, and more on active days. The U.S. Nation­al Acad­e­mies of Sci­ences, Engi­neer­ing, and Med­i­cine rec­om­mends rough­ly 3.7 liters of total water per day for men and 2.7 liters for women, from all sources of food and drink.

Be Smart About Napping

If after­noon fatigue hits hard, a short nap can help — but the tim­ing and length mat­ter. Keep naps to 20 – 30 min­utes and before 3 PM. Longer naps can pull you into deep­er sleep stages, mak­ing you feel grog­gy instead of refreshed and inter­fer­ing with your sleep that night.

Move Your Body — But Time It Right

Reg­u­lar exer­cise is one of the most effec­tive treat­ments for fatigue. Research from Johns Hop­kins Med­i­cine shows that aer­o­bic exer­cise improves sleep qual­i­ty and reduces day­time sleepi­ness. The catch: work­ing out too close to bed­time can make it hard­er to fall asleep. Give your­self at least 3 hours between a work­out and lights-out.

Fuel Your­self the Right Way

What you eat direct­ly affects how ener­gized you feel. A diet rich in whole grains, lean pro­teins, and fresh veg­eta­bles sup­ports sta­ble ener­gy lev­els through­out the day. Foods high in B vit­a­mins — like leafy greens, eggs, and legumes — are espe­cial­ly help­ful, as B vit­a­mins play a key role in reg­u­lat­ing mela­tonin pro­duc­tion. Accord­ing to the USDA’s Dietary Guide­lines for Amer­i­cans, most adults fall short of rec­om­mend­ed amounts of veg­eta­bles, fiber, and key micronu­tri­ents that sup­port sleep and ener­gy metabolism.

Give Your Eyes a Break

Pro­longed screen time is exhaust­ing — lit­er­al­ly. Star­ing at dig­i­tal screens can dry out and strain your eyes, con­tribut­ing to that heavy, tired feel­ing by mid-after­noon. Try the 20−20−20 rule: every 20 min­utes, look at some­thing 20 feet away for 20 sec­onds. It sounds sim­ple, but it makes a real difference.

Use Sleep Aids Wise­ly or Not at All

Mela­tonin sup­ple­ments can be use­ful for reset­ting your sleep sched­ule — think jet lag or a shift in work hours — but they’re not a long-term solu­tion. Rely­ing on them night­ly can reduce your body’s nat­ur­al mela­tonin pro­duc­tion over time. If you’re reg­u­lar­ly reach­ing for a sleep aid to fall asleep, that’s worth a con­ver­sa­tion with your provider.

Is your fatigue nor­mal or some­thing more seri­ous? Check with your Duly doc – book a vis­it today. >

What About Men­tal Fatigue?

If your tired­ness lives more in your head than your body, you’re deal­ing with men­tal fatigue — and it’s just as real. Sus­tained con­cen­tra­tion, emo­tion­al labor, deci­sion over­load, and dig­i­tal over­stim­u­la­tion drain cog­ni­tive resources, and no amount of sleep ful­ly recov­ers them.

Anx­i­ety, depres­sion, and chron­ic stress are major con­trib­u­tors. The CDC reports that more than 1 in 5 Amer­i­can adults lives with a men­tal ill­ness, and fatigue is one of the most com­mon symp­toms. Address­ing the root cause — whether that’s stress man­age­ment, ther­a­py, or med­ica­tion — can make a dra­mat­ic dif­fer­ence in over­all ener­gy levels.

A few strate­gies that help: sched­uled breaks through­out the work­day, set­ting firm lim­its on news and social media con­sump­tion, and build­ing in moments of actu­al rest — not just pas­sive scrolling. Some­times the most pro­duc­tive thing you can do is stop.

If men­tal fatigue feels per­sis­tent or is affect­ing your rela­tion­ships, work, or enjoy­ment of life, that’s your sig­nal to loop in a pro­fes­sion­al. You should­n’t push through this.

How Much Sleep Do You Actu­al­ly Need?

The stan­dard advice is 7 to 9 hours for adults, but the truth is a lit­tle more indi­vid­ual than that. Here’s a sim­ple way to find your per­son­al sweet spot:

Set your alarm for 7.5 hours after you go to bed. If you wake up before it goes off feel­ing rest­ed, that’s prob­a­bly your ide­al amount. If you’re still grog­gy when the alarm sounds, you like­ly woke up mid-sleep cycle. Try push­ing your alarm back by 15 min­utes each night until you con­sis­tent­ly wake up feel­ing refreshed.

One impor­tant note: sleep­ing too much can also sig­nal that some­thing’s off. Research from the NIH has linked both short and long sleep dura­tion to increased risk of car­dio­vas­cu­lar dis­ease, obe­si­ty, and meta­bol­ic dis­or­ders. If you’re sleep­ing 9 or more hours and still exhaust­ed, it’s time to talk to your doctor.

When to Talk to Your Provider

Occa­sion­al tired­ness is part of life. But per­sis­tent fatigue that affects your dai­ly func­tion­ing is dif­fer­ent, and it deserves atten­tion. The soon­er you address it, the soon­er you can feel like your­self again.

“Ear­ly detec­tion is impor­tant because per­sis­tent fatigue and inad­e­quate sleep can affect con­cen­tra­tion, mood, phys­i­cal health, work per­for­mance, and poten­tial­ly sig­nal an under­ly­ing health con­di­tion,” says Dr. Tas­neem Habib, Inter­nal Med­i­cine physi­cian at Duly Health and Care.

Reach out to your provider if fatigue is:

• Inter­fer­ing with work, rela­tion­ships, or dai­ly activities
• Accom­pa­nied by mood changes, brain fog, or unex­plained phys­i­cal symptoms
• Not improv­ing despite mak­ing sleep and lifestyle changes.
• Some­thing you sus­pect may be con­nect­ed to a med­ica­tion you’re taking.

Fatigue can some­times sig­nal an under­ly­ing con­di­tion like ane­mia, thy­roid dys­func­tion, sleep apnea, or depres­sion — all of which are treat­able. That’s why a good eval­u­a­tion looks at the whole pic­ture, not just your bed­time routine.

“My approach to chron­ic fatigue would be first to iden­ti­fy the under­ly­ing cause rather than assum­ing it is sim­ply poor sleep hygiene,” says Dr. Habib. ​“I assess sleep dura­tion, qual­i­ty, sleep sched­ule, med­ica­tions, men­tal health, med­ical con­di­tions, and symp­toms sug­ges­tive of sleep apnea and insomnia.”

A sim­ple con­ver­sa­tion with your pri­ma­ry care provider can help rule out any­thing seri­ous and get you on a path to actu­al­ly feel­ing better.

The Bot­tom Line

Feel­ing rest­ed and ener­gized isn’t a lux­u­ry — it’s the foun­da­tion of every­thing else. Your mood, your focus, your immune sys­tem, your rela­tion­ships: they all run bet­ter when your body is get­ting the sleep and recov­ery it needs.

The strate­gies here aren’t com­pli­cat­ed, and you don’t need to over­haul your life overnight. Start with one or two changes — a con­sis­tent bed­time, less caf­feine in the after­noon, or a 20-minute walk — and build from there. Small shifts, done con­sis­tent­ly, cre­ate real results.

Your ener­gy is worth pro­tect­ing. And if you need a lit­tle help get­ting there, your care team is ready!

Tired of being tired? Sched­ule an appoint­ment with a Duly physi­cian today. >

Fre­quent­ly Asked Questions

Why am I still tired after a full night’s sleep? Get­ting enough hours does­n’t always mean you’re get­ting qual­i­ty sleep. Con­di­tions like sleep apnea can inter­rupt your rest with­out ful­ly wak­ing you, and stress, dehy­dra­tion, alco­hol, cer­tain med­ica­tions, and health issues like ane­mia or thy­roid prob­lems can also leave you drained. If it keeps hap­pen­ing, talk with your Duly provider.

What’s the dif­fer­ence between fatigue and sleepi­ness? Sleepi­ness is the urge to fall asleep, and it usu­al­ly improves after good rest. Fatigue is a deep­er lack of phys­i­cal or men­tal ener­gy that can linger even after you’ve slept well. You can feel fatigued with­out being sleepy, which is one rea­son per­sis­tent fatigue is worth look­ing into.

Can a vit­a­min defi­cien­cy make you tired? Yes. Low lev­els of iron, vit­a­min B12, and vit­a­min D are com­mon cul­prits behind ongo­ing tired­ness, and iron defi­cien­cy can lead to ane­mia. A sim­ple blood test can check your lev­els, so talk with your provider before start­ing sup­ple­ments on your own.

When should I see a doc­tor about fatigue? Make an appoint­ment if your fatigue lasts more than a few weeks, does­n’t improve with bet­ter sleep and lifestyle changes, or comes with oth­er symp­toms like mood changes, unex­plained weight changes, or short­ness of breath. Your Duly provider can help find the cause and build a plan that works for you.