Waking up sweating and shaking can happen when your body has a sudden stress or energy response during sleep, for example from a blood sugar drop, stress hormones, or overheating. It can feel intense, and it is not always harmless: if it keeps happening, or you have diabetes, read when to see a doctor.
Who this is for
- You wake up suddenly feeling sweaty, shaky, or anxious
- Your heart may feel like it’s racing
- It happens in the middle of the night or early morning
- You feel better after a few minutes (or after eating or drinking)
- It happens occasionally or in patterns
Quick Fix / Summary
- Avoid sugary foods and alcohol before bed
- If blood sugar may be involved, some people try a small snack before bed (if you have diabetes, follow your care team’s advice)
- Keep your room cool and breathable
- Don’t engage with panic, focus on slow breathing
- Track when it happens (timing, food, stress)
- Keep a consistent sleep routine
What’s Actually Causing Sweating and Shaking at Night
1. Blood Sugar Drops During the Night
Low blood sugar is best documented in people with diabetes who take insulin or certain other diabetes medicines. MedlinePlus describes it as rare in people without diabetes, with causes such as liver or kidney disease, hormone deficiencies or certain medicines.
When blood sugar drops too low, the CDC lists a fast heartbeat, shaking, sweating and nervousness or anxiety as symptoms. The NIDDK adds that overnight lows can cause sweating heavy enough to dampen your pajamas or sheets, nightmares, and waking up tired, irritable or confused.
What this looks like:
- Sudden waking with sweating and shaking
- Feeling anxious or “on edge”
- You may feel better after eating
Real-life example:
You wake up around 3–4AM feeling shaky and restless, then calm down after a few minutes.
What to do:
- Eat balanced meals during the day
- Avoid sugar-heavy snacks at night
- If you do not have diabetes and blood sugar seems involved, some people try a small snack before bed (with diabetes, follow your care team’s advice), for example:
- Nuts
- Greek yogurt
- Peanut butter
If this fits your pattern, it helps to understand does blood sugar affect sleep at night, since low blood sugar can cause nighttime symptoms in some people.
2. Stress Hormones Are Spiking at Night
Your body can release cortisol or adrenaline while you sleep.
What this looks like:
- You wake up suddenly, feeling alert or anxious
- Your body feels tense or shaky
Why it happens:
A possible explanation: your nervous system may still be in “alert mode.”
What to do:
- Reduce stimulation in the evening
- Use slow breathing:
- Inhale 4 seconds
- Exhale 6–8 seconds
If your mind becomes active at night, this overlaps with why you wake up with anxiety in the middle of the night, where your body triggers a stress response.
3. Overheating Triggers a Stress Response
If your body gets too warm, it can wake you abruptly. The NHS lists menopause, anxiety, some medicines, low blood sugar and alcohol among the common causes of night sweats.
Signs:
- You wake up hot or sweaty
- You kick off blankets or move around
What to do:
- Use breathable bedding (cotton or linen)
- Keep your room slightly cool
- Layer blankets instead of using one heavy duvet
If this is frequent, improving how you sleep cooler at night may reduce these wake-ups.
If this happens alongside daytime hot flashes, or you’re in your 40s or 50s, hormonal changes may be the driver rather than just room temperature, see menopause night sweats and how to sleep better.
4. You’re Waking From a Light Sleep Stage
Toward morning, your sleep becomes lighter.
What happens:
- You’re easier to wake
- Your body may react more strongly to small triggers
Result:
You may wake with a sudden physical reaction like shaking or sweating.
5. Anxiety or Panic-Like Responses During Sleep
Your body can trigger a panic-like response even while asleep.
What this looks like:
- Sudden wake-up with intense physical symptoms
- Rapid heart rate, sweating, shaking
Why it happens:
Your nervous system activates without a clear external trigger.
What to do:
- Focus on calming your body first
- Avoid engaging with thoughts or panic
6. Alcohol or Late Eating Can Make It Worse
Certain habits increase the likelihood of these episodes.
What happens:
- Alcohol disrupts sleep cycles
- Sugar may cause spikes and dips in some people
Result:
Your sleep may become less stable.
What to do:
- Avoid alcohol before bed
- Eat lighter, balanced meals
What To Do When It Happens
Step-by-step:
- Stay still and breathe slowly
Don’t react with panic - Focus on your breath
- Inhale 4 seconds
- Exhale 6–8 seconds
- Let your body settle
The feeling usually passes - Sit up if needed
This may feel more comfortable - Drink water
A few sips can help if you are thirsty
How to Reduce These Episodes Long-Term
- Keep your evenings calm and predictable
- Avoid sugar and alcohol late
- Improve your sleep environment
- Maintain a consistent sleep schedule
- Track patterns to identify triggers
Practical Tips That Actually Help
- If it happens at the same time → look at the timing of food, alcohol and stress that evening
- If you feel hot → adjust bedding first
- If you feel anxious → focus on calming your body, not your thoughts
- If it improves after eating → blood sugar may be involved, which is worth mentioning to a doctor
- Small habit changes may help, though results vary
Common Mistakes to Avoid
- Panicking during the episode – may make it feel worse
- Eating sugar before bed – may cause a blood sugar dip later in some people
- Using alcohol to relax – disrupts sleep
- Ignoring patterns in timing or triggers
- Trying to “fight” the feeling instead of calming your body
When to See a Doctor
The NHS advises seeing a GP if you have night sweats regularly that wake you up or worry you, if they come with a very high temperature (or feeling hot, cold or shivery), a cough or diarrhoea, or if you are losing weight for no reason.
If you have diabetes and wake up shaky and sweaty, check your blood sugar and talk to your care team, because overnight lows can be dangerous. The CDC warns that very low blood sugar can cause seizures or fainting, which needs emergency help. If a racing heart comes with chest pain, severe shortness of breath or fainting, get emergency help (Mayo Clinic lists chest discomfort or pain, fainting, severe shortness of breath and severe dizziness as emergency signs).
FAQ
What’s the most common cause of waking up sweating and shaking?
Low blood sugar is one possible cause, mainly in people with diabetes who take insulin or certain other diabetes medicines. The CDC lists a fast heartbeat, shaking, sweating and nervousness or anxiety as symptoms. Stress hormones, overheating, alcohol and menopause are other common causes of night sweats.
What should I do in the moment when I wake up sweating and shaking?
Stay still and breathe slowly, inhaling for 4 seconds and exhaling for 6 to 8 seconds, and let your body settle rather than reacting with panic. Sitting up briefly may feel more comfortable, and a few sips of water can help if you are thirsty.
Can eating before bed help prevent these episodes?
It may help if your episodes are blood-sugar related, but this is a practical idea rather than a proven fix. Eating regular meals and avoiding sugar-heavy snacks at night is sensible, and some people try a small snack such as nuts, Greek yogurt or peanut butter before bed. If you have diabetes, follow your care team’s advice instead.
When should waking up sweating and shaking be checked by a doctor?
The NHS advises seeing a GP if night sweats keep waking you or worry you, come with a very high temperature, a cough or diarrhoea, or happen alongside unexplained weight loss. Get checked too if you have diabetes, and get emergency help for chest pain, severe shortness of breath or fainting.
Key Takeaways
Waking up sweating and shaking can come from a blood sugar drop, a stress response, or overheating during sleep. Steadier evening habits, a cooler room and calming breathing are sensible things to try. If episodes keep coming back, you have diabetes, or other symptoms appear, see a doctor.
About this article
Written by the Sleep Fixes editorial team. We’re not medical professionals, we research each topic against primary sources and hold ourselves to being critical and thorough about what actually makes it onto the site. Sweating and shaking at night has several possible causes, and if it happens often, alongside chest pain, or if you have diabetes, it is worth checking with a doctor rather than assuming it will resolve on its own.
This article is part of Sleep Fixes, a site focused on practical, easy-to-follow solutions for common sleep problems like night waking, dry mouth, overheating, and disrupted sleep.
The content is based on widely accepted sleep principles and common real-world patterns, with a focus on simple changes that may improve sleep quality.
It is not medical advice. If your symptoms are severe, persistent, or worsening, consider consulting a qualified healthcare professional.