Hashimoto's and Sleep: Why Can You Have Trouble Sleeping?

Maybe you're completely exhausted when you go to bed, yet you still can't fall asleep.

Or perhaps you fall asleep easily but wake up repeatedly throughout the night.

You might sleep for eight or nine hours and still wake up feeling drained.

If you have Hashimoto's, it's understandable to wonder whether your thyroid is affecting your sleep.

**Hashimoto's and sleep problems can occur together, but not every sleep problem is caused by Hashimoto's.**

An underactive thyroid may contribute to fatigue and increased sleepiness. Too much thyroid hormone, on the other hand, can cause restlessness and difficulty sleeping.

Sleep apnea, restless legs syndrome, stress, hormonal changes, and other factors may also affect your nights.

That's why the first step is understanding what kind of sleep problem you're experiencing.

What Sleep Problems Can Occur With Hashimoto's?

Sleep difficulties can take several forms.

Perhaps you lie awake for a long time before falling asleep. Or you wake several times during the night and struggle to get back to sleep.

Some people wake much earlier than they intended, while others sleep for a long time but still feel unrefreshed.

You might also feel unusually sleepy during the day, even when you believe you've slept enough.

These problems can occur in people with Hashimoto's, but they aren't specific to the condition.

Distinguishing difficulty falling asleep, frequent awakenings, and unrefreshing sleep matters because the possible causes and treatments may differ.

Can Hashimoto's Cause Sleep Problems?

Hashimoto's is an autoimmune condition in which the immune system attacks the thyroid gland.

Over time, this may lead to hypothyroidism, or an underactive thyroid.

When your body doesn't have enough thyroid hormone, fatigue, slower functioning, and an increased need for sleep may occur.

But Hashimoto's doesn't automatically cause insomnia.

You can have Hashimoto's while your thyroid function remains normal.

And even if you have hypothyroidism, your sleep difficulties may have another explanation.

That's why looking only at your Hashimoto's diagnosis isn't enough.

It's just as important to understand what happens during the night and how you feel during the day.

What's the Difference Between Fatigue and Sleepiness?

Fatigue and sleepiness are often used interchangeably.

However, they aren't the same thing.

**Fatigue** means having little energy, feeling physically exhausted, or struggling to maintain everyday activities.

**Sleepiness** means actually feeling inclined to fall asleep.

You can therefore feel extremely fatigued without nearly falling asleep during the day.

Conversely, you can feel sleepy because your sleep is repeatedly interrupted, even when you spend enough hours in bed.

This distinction may help your healthcare professional investigate the possible causes more effectively.

Why Can You Sleep for Hours and Still Wake Up Tired?

Sleeping for many hours doesn't automatically mean you're sleeping well.

When sleep is repeatedly interrupted, you may spend eight or nine hours in bed and still wake up feeling unrefreshed.

You might not even notice those interruptions yourself.

With sleep apnea, for example, breathing is repeatedly disrupted during sleep, which can reduce sleep quality.

But hypothyroidism, anemia, certain medications, hormonal changes, depression, and other conditions may also contribute to ongoing fatigue.

That's why "I sleep a lot, but I'm still tired" doesn't automatically mean you need more hours of sleep.

Sometimes it's more important to investigate why your sleep isn't sufficiently restorative.

Can an Underactive Thyroid Affect Your Sleep?

An underactive thyroid is mainly associated with fatigue, sleepiness, and an increased need for sleep.

Other symptoms may occur at the same time, including feeling cold, constipation, dry skin, muscle discomfort, concentration difficulties, and weight gain.

If you're sleeping poorly or feeling constantly exhausted alongside several symptoms consistent with hypothyroidism, checking thyroid function may be appropriate.

TSH and free T4 are important blood tests used to assess thyroid function.

However, your sleep pattern alone can't determine whether your thyroid is underactive.

Can Too Much Thyroid Hormone Cause Insomnia?

Yes.

Excess thyroid hormone can cause palpitations, trembling, sweating, heat intolerance, physical restlessness, and difficulty sleeping.

This may occur, for example, when someone takes more levothyroxine than their body needs.

Sometimes a wired or restless feeling makes it harder to relax or fall asleep.

If you take levothyroxine and your sleep problems began after a dose increase, discuss this with your healthcare professional.

They can decide whether TSH and free T4 testing is appropriate.

That doesn't mean every poor night of sleep proves your dose is too high.

Never adjust thyroid medication on your own based solely on sleep problems.

Why Can You Feel Exhausted While Your Mind Keeps Racing at Night?

Perhaps your body feels drained, but your thoughts become active as soon as you get into bed.

You think about what happened during the day, what needs doing tomorrow, or things you're worried about.

This can make falling asleep difficult.

Worry, stress, anxiety, working late, and prolonged mental activity may all contribute.

However, this isn't a specific feature of Hashimoto's.

It's therefore inaccurate to assume that Hashimoto's automatically keeps your nervous system permanently switched on.

If you struggle to settle your mind at night, it may help to look at your evening habits and the circumstances in which you're trying to sleep.

Can Sleep Apnea Cause Fatigue in People With Hashimoto's?

Yes. Someone with Hashimoto's can also have sleep apnea.

Sleep apnea is a condition in which breathing repeatedly stops or becomes reduced during sleep.

This can interrupt your sleep, sometimes without you being aware of it.

Possible signs include loud snoring, breathing pauses noticed by a partner, gasping for air during sleep, morning headaches, and pronounced daytime sleepiness.

Some people also wake frequently or feel exhausted every morning.

Not everyone with sleep apnea experiences the same symptoms.

If you remain very tired or sleepy despite spending enough hours asleep, especially if you snore or someone has noticed breathing pauses, discuss this with your healthcare professional.

Spending more hours in bed won't resolve untreated sleep apnea.

Can Restless Legs Syndrome Disrupt Your Sleep?

Yes.

Restless legs syndrome involves a strong urge to move the legs, usually during rest.

This often occurs alongside uncomfortable sensations in the legs.

Symptoms are generally worse in the evening or at night, and movement provides temporary relief.

As a result, falling asleep may become difficult.

Restless legs syndrome can have several causes and associations. Iron deficiency is one possible contributing factor.

If you experience these symptoms regularly, discuss them with your healthcare professional.

Avoid taking high-dose iron supplements without a clear medical reason.

Iron supplements can also interfere with levothyroxine absorption when taken too close together.

Hashimoto's and Poor Sleep During Perimenopause or Menopause

During perimenopause and menopause, hormonal changes can affect your sleep.

You may wake because of hot flashes or night sweats.

However, sleep changes can also occur without obvious hot flashes.

This matters because Hashimoto's and menopausal symptoms can occur at the same time.

Poor sleep, fatigue, mood changes, and concentration difficulties may overlap.

If your sleep begins to change during this stage of life, not every symptom necessarily comes from your thyroid.

Your age, menstrual pattern, other symptoms, and thyroid blood tests may all provide useful context.

Can Stress Disrupt Your Sleep?

Stress can make it harder to fall asleep or stay asleep.

Perhaps you find yourself thinking about work, family, or other concerns while lying in bed.

Or you wake during the night and struggle to relax again.

This happens in people without Hashimoto's too.

But stress shouldn't automatically be used to explain every sleep problem.

If you've been sleeping poorly for months, experience severe daytime sleepiness, or develop new physical symptoms, further assessment may be appropriate.

Both daily stress and possible medical causes deserve attention.

Can Coffee Affect Your Sleep?

Yes. Caffeine has a stimulating effect and can make it harder to fall asleep or disrupt your sleep.

Sensitivity varies between individuals.

Some people notice little effect from afternoon coffee, while others still feel alert late in the evening.

Caffeine isn't found only in coffee. Tea, cola, energy drinks, and chocolate can also contain it.

If you're sleeping poorly, it may help to consider how much caffeine you consume and at what times.

This doesn't mean everyone with Hashimoto's needs to stop drinking coffee.

Pay attention to how it affects your own sleep.

If you take levothyroxine, follow the recommended administration instructions. Coffee may reduce levothyroxine absorption when consumed too soon after your tablet.

What About Alcohol?

Alcohol may initially make falling asleep feel easier.

However, it can disrupt sleep later in the night and cause more awakenings.

It may also worsen existing sleep problems.

Don't use alcohol as a sleep aid.

If you notice poorer sleep after drinking alcohol, that may be a useful pattern to recognize.

Which Sleep Habits May Help?

For many people, simple and consistent sleep habits can be helpful.

Try to wake up at approximately the same time each day and keep your sleep schedule reasonably regular.

Get daylight during the day and stay physically active as much as your health and capacity allow.

A dark, quiet, and comfortable bedroom may support better sleep.

It may also help to reduce bright light in the evening, limit late caffeine consumption, and allow time to unwind.

You don't need an elaborate two-hour bedtime routine.

Consistent, manageable habits are often more useful than trying to achieve perfect sleep every night.

What Can You Do if You Can't Fall Asleep?

Lying awake for a long time can become frustrating, especially if you keep checking the clock.

You might start calculating how many hours of sleep you have left.

That can increase the pressure to fall asleep.

If you're wide awake for an extended period, it may help to get out of bed and do something quiet in dim lighting.

Return when you feel sleepy again.

The aim is to help your bed remain associated with sleep rather than long periods of wakefulness and worry.

You don't need to watch the clock or count exactly twenty minutes.

Should You Go to Bed Earlier if You're Always Tired?

Not automatically.

When you're exhausted during the day, going to bed earlier may seem like the obvious answer.

But feeling fatigued doesn't always mean you're sleepy at that moment.

Spending much longer in bed than you actually sleep can sometimes make certain types of insomnia worse.

It's not only about maximizing time spent in bed.

It's about getting enough sleep of appropriate quality.

Sleep needs vary somewhat between individuals. Most adults generally need around seven to nine hours per night.

Consider not only the number of hours, but also how well you function during the day.

What Helps With Long-Term Insomnia?

If you've had difficulty falling asleep or staying asleep for a long time, general sleep tips may not be enough.

For chronic insomnia, cognitive behavioral therapy for insomnia, often called CBT-I, is a recommended treatment.

It addresses habits, thoughts, and patterns that can maintain sleep difficulties.

This is different from simply trying to go to bed earlier or practicing relaxation.

Your healthcare professional can help you explore which treatment or support is appropriate.

Avoid using sleeping medication long-term without medical guidance, and discuss any medication with a qualified clinician.

What if Your Thyroid Levels Are Normal but You Still Sleep Poorly?

When TSH and free T4 are appropriate, increasing levothyroxine shouldn't automatically be considered a solution.

Normal thyroid levels make it more important to investigate other possible explanations.

These may include sleep apnea, restless legs syndrome, stress, anxiety, depression, pain, menopausal symptoms, medication, caffeine, alcohol, or another sleep disorder.

Sometimes several causes exist together.

You can have Hashimoto's and sleep apnea.

Or Hashimoto's and menopausal symptoms.

One diagnosis doesn't exclude another.

That's why persistent sleep problems shouldn't automatically be attributed to your thyroid.

When Should You See a Doctor About Poor Sleep?

Almost everyone experiences a few bad nights occasionally.

However, if sleep difficulties persist, recur frequently, or significantly affect your daily life, discuss them with a healthcare professional.

This is particularly important if you're extremely sleepy during the day, regularly fall asleep unintentionally, snore loudly, or may have breathing pauses during sleep.

Frequently gasping for air at night, restless legs, new palpitations, or persistent exhaustion despite adequate sleep also deserve attention.

If you're sleepy, take extra care with driving or activities that require alertness.

Don't drive if you're struggling to stay awake.

What Can You Track in a Sleep Diary?

A simple sleep diary may help reveal patterns.

For one or two weeks, note approximately when you go to bed, how long it takes to fall asleep, and how often you wake during the night.

Also record when you get up, whether you nap during the day, and how refreshed you feel.

If relevant, you can include caffeine, alcohol, medication, and other symptoms.

You don't need to measure every minute of sleep.

The aim is to create an overview you can discuss with your healthcare professional.

A smartwatch or sleep tracker may provide interesting information, but it can't diagnose a sleep disorder on its own.

Hashimoto's and Sleep: What Should You Remember?

Hashimoto's and sleep problems can occur together, but poor sleep isn't always caused by your thyroid.

When Hashimoto's leads to hypothyroidism, fatigue and increased sleepiness may occur.

Excess thyroid hormone, on the other hand, can cause restlessness, palpitations, and insomnia.

Sleep apnea, restless legs syndrome, stress, hormonal changes, medication, caffeine, and other factors may also contribute.

So don't focus only on how many hours you sleep.

Consider how you sleep, what keeps you awake, and how you feel during the day.

And if sleep becomes an ongoing problem, you don't have to automatically accept it as something that simply comes with Hashimoto's.

Working with a healthcare professional to understand the cause may be an important next step.