Hangover or Alcohol Withdrawal? How to Tell the Difference

By The Recover Editorial Team | Updated October 14, 2026

Shaky hands, sweating, nausea, a pounding heart, and a sense of dread. Those symptoms can describe a rough hangover. They can also describe the early stages of alcohol withdrawal. From the inside, the two can feel almost identical, which is exactly why so many people brush off withdrawal as “just a bad hangover.”

The difference matters. A hangover is miserable but passes on its own. Alcohol withdrawal can escalate over a day or two into seizures or a life-threatening condition called alcohol withdrawal delirium. This guide explains how to tell a hangover from alcohol withdrawal, the symptoms that only show up in withdrawal, and when you need urgent care.

Key takeaways A hangover follows a single drinking episode, starts as blood alcohol drops toward zero, and usually improves within about 24 hours.Alcohol withdrawal follows sustained heavy drinking. It typically starts 6 to 24 hours after the last drink and often gets worse over the next one to three days.The clearest clues to withdrawal: symptoms that build instead of fade, a hand tremor, symptoms that a drink relieves, and a pattern that repeats most mornings or whenever you cut back.Hallucinations, seizures, and confusion are never part of a hangover. Call 911 if they occur.If you drink heavily or daily, do not stop suddenly without medical guidance. Withdrawal can become more severe with each episode.

What Is a Hangover?

An international group of hangover researchers defines the alcohol hangover as the combination of negative mental and physical symptoms that can follow a single episode of drinking, beginning when blood alcohol concentration approaches zero. In other words, a hangover is what your body goes through as it clears one night’s alcohol and recovers from dehydration, poor sleep, low blood sugar, and inflammation.

Typical hangover symptoms include headache, fatigue, thirst, nausea, sensitivity to light and sound, poor concentration, low mood, anxiety, and sometimes a fast heartbeat. Hangovers vary in shape: some ease steadily through the day, others hold steady or peak around midday. But they generally resolve within about a day, and they do not escalate into seizures or hallucinations.

What Is Alcohol Withdrawal?

Alcohol withdrawal happens when the brain has adapted to regular heavy drinking and then loses alcohol’s effect. Alcohol enhances the brain’s calming signals and suppresses its excitatory ones. Over weeks and months of heavy use, the brain compensates. When drinking stops or drops sharply, that compensation is left unopposed and the nervous system becomes over-excited.

According to American Family Physician, withdrawal is likely when large amounts of alcohol have been consumed for more than about two weeks and then stopped abruptly. Under DSM-5 criteria, withdrawal is diagnosed when, within several hours to a few days of stopping or reducing heavy, prolonged drinking, a person develops at least two of these symptoms:

Autonomic hyperactivity, such as sweating or a pulse above 100 beats per minute
Increased hand tremor
Insomnia
Nausea or vomiting
Brief visual, tactile, or auditory hallucinations or illusions
Psychomotor agitation (restlessness, pacing, inability to sit still)
Anxiety
Generalized tonic-clonic seizures

Notice how many of these overlap with a hangover. That overlap is the problem, and why the pattern of symptoms matters more than any single one.

Hangover vs. Alcohol Withdrawal: Side-by-Side

Feature	Hangover	Alcohol withdrawal
What sets it off	A single drinking episode	Stopping or cutting back after sustained heavy drinking
When it starts	As blood alcohol approaches zero, usually the next morning	Usually 6–24 hours after the last drink
Direction over time	Improves through the day	Often worsens over 24–72 hours
How long it lasts	Usually under 24 hours	Acute phase about 4–7 days; sleep and mood effects can last weeks
Tremor	Mild shakiness that settles with food and rest	Noticeable hand tremor that can grow stronger
Heart rate and blood pressure	May be mildly elevated, then settle	Often climbing; sweating and fever possible
Hallucinations, seizures, confusion	Never	Possible, and an emergency
Effect of a drink	May dull symptoms briefly	Reliably relieves symptoms (a key warning sign)
Pattern	Occasional, after heavy nights	Most mornings, or whenever you go without
Next step	Rest, fluids, food, time	Medical assessment; supervised detox if needed

7 Clues It May Be Withdrawal, Not a Hangover

1. Your drinking has been heavy and regular

A hangover can happen to anyone after a big night. Withdrawal requires a body that has adapted to alcohol, which usually means drinking heavily on most days for weeks or longer. If that describes your recent pattern, treat next-day symptoms with more caution.

2. Symptoms are getting worse, not better

This is the most useful single test. A hangover is usually at its worst when you wake up and improves as the day goes on. Withdrawal often intensifies over the first one to three days, with symptoms peaking around day two. If you feel worse on the second day than the first, think withdrawal.

3. A drink makes it go away

If a morning drink, sometimes called an “eye-opener,” reliably steadies your hands, settles your stomach, or calms your anxiety, your body is signaling physical dependence. This is one of the clearest differences between a hangover and withdrawal.

4. You have a visible tremor

Shaky, unsteady hands, sometimes with a trembling tongue or eyelids, are a hallmark of withdrawal. Mild shakiness from low blood sugar usually improves after a meal. A tremor that persists or grows stronger does not.

5. Your heart rate, blood pressure, or temperature keep rising

Both hangovers and withdrawal can raise your heart rate. In withdrawal, the overactive nervous system tends to push heart rate and blood pressure higher over time, often with heavy sweating and sometimes a low fever. For more on the heart side, see our guide on why your heart races the morning after drinking.

6. You cannot sleep, and anxiety is building

Insomnia, restlessness, and rising anxiety are early withdrawal symptoms. Hangover anxiety usually fades within a day or two; withdrawal anxiety tends to climb alongside the physical symptoms. If you are still anxious two days later, read our guide on hangxiety that lasts two days. Low mood can also linger; we cover that in why you may feel depressed for days after drinking.

7. It happens every time you stop

Occasional hangovers after heavy nights are one thing. Feeling sick, shaky, or anxious most mornings, or whenever you skip drinking for a day, is a pattern of withdrawal.

Alcohol Withdrawal Timeline

Not everyone goes through every stage, and severity is hard to predict. Clinicians generally describe this progression after the last drink:

Time after last drink	What may happen
6–24 hours	Early symptoms: tremor, anxiety, sweating, nausea, headache, insomnia, fast heartbeat. Easy to mistake for a hangover.
12–48 hours	Some people develop alcoholic hallucinosis: seeing, hearing, or feeling things that are not there, usually while otherwise alert.
24–72 hours	Peak window for withdrawal seizures and for symptoms overall. Seizures are usually generalized and brief.
48–96 hours	Alcohol withdrawal delirium (formerly delirium tremens) may begin in a small percentage of people: confusion, disorientation, agitation, fever, and severe autonomic instability.
Days 4–7	Acute symptoms usually ease with appropriate care.
Weeks to months	Some people have lingering insomnia, anxiety, irritability, and low mood, sometimes called protracted withdrawal.

StatPearls estimates that about 3% to 5% of people with alcohol withdrawal syndrome progress to withdrawal delirium, which can be fatal without treatment. American Family Physician notes that up to one-third of people who have a withdrawal seizure go on to develop delirium. Learn more in our guide to why alcohol withdrawal can be dangerous.

Why Telling the Difference Matters

Withdrawal can escalate quickly

Without treatment, mild withdrawal can progress to moderate and then severe symptoms within a day or two. Recognizing it early gives you the chance to get care before seizures or delirium develop.

Each withdrawal can be worse than the last

Withdrawal shows a “kindling” effect: repeated episodes tend to lower the seizure threshold and make later withdrawals more severe. Someone who has gone through withdrawal several times, especially without medical care, faces higher risk the next time.

Treating it as a hangover can keep the cycle going

If withdrawal is mistaken for a hangover, the most common “remedy” is another drink. That relieves symptoms for a few hours, deepens dependence, and sets up a harder withdrawal later.

Who Is at Higher Risk for Severe Withdrawal?

According to American Family Physician and the American Society of Addiction Medicine (ASAM), risk for severe or complicated withdrawal is higher in people who:

Have been drinking heavily for a long time
Have had alcohol withdrawal seizures or withdrawal delirium before
Have gone through multiple prior withdrawals
Are older
Have other medical conditions, such as liver disease, heart disease, or infections, or abnormal lab results
Also use sedatives such as benzodiazepines, sleep medications, or opioids
Have a serious psychiatric condition or little support at home

ASAM recommends that clinicians assess withdrawal risk in anyone who drinks regularly, using screening tools such as the Prediction of Alcohol Withdrawal Severity Scale (PAWSS), rather than waiting for symptoms to appear.

Which Symptoms Require Urgent Care

Call 911 immediately for:

A seizure
Confusion, disorientation, or not knowing where you are
Hallucinations: seeing, hearing, or feeling things that are not there
Severe agitation, extreme restlessness, or uncontrollable shaking
High fever with heavy sweating
Chest pain, fainting, or a very fast or irregular heartbeat
Repeated vomiting and inability to keep fluids down

Do not try to manage these symptoms at home, and do not drink to stop them. Emergency teams can treat withdrawal quickly and safely.

Contact a medical provider the same day if:

You have tremor, sweating, nausea, or anxiety that is getting worse a day after your last drink
You have had withdrawal before, especially seizures or delirium
You drink heavily every day and want to stop or cut back
A drink is the only thing that makes you feel normal in the morning
You also take sedatives, sleep aids, or opioids

If you are having thoughts of harming yourself, call or text 988 to reach the 988 Suicide & Crisis Lifeline, or see our crisis resources.

A Quick Self-Check

These questions are not a diagnosis, but answering “yes” to any of them is a good reason to talk with a medical provider:

Have I been drinking heavily most days for the past few weeks or longer?
Do my symptoms get worse on the second day instead of better?
Do my hands shake in the morning?
Does having a drink make me feel better or steadier?
Do I feel sick, shaky, or anxious whenever I go a day without drinking?
Have I gone through withdrawal, had a seizure, or needed detox before?

If You Have a Hangover: What Helps

If your drinking is occasional, your symptoms are improving, and you have no warning signs, a hangover will pass with time. Rest, sip water or an electrolyte drink, eat simple food, avoid extra caffeine, and skip the “hair of the dog.” If symptoms are not easing by the end of the day, or you notice any of the warning signs above, get checked.

If It Is Withdrawal: Getting Safe Care

Alcohol withdrawal is very treatable, and getting help early makes it much safer and more comfortable. Clinicians usually assess severity with a structured tool such as the CIWA-Ar, check vital signs and blood work, and treat symptoms with medication when needed, along with fluids, nutrition, and thiamine to protect the brain. ASAM guidelines recommend benzodiazepines as the first-line treatment for uncomplicated withdrawal, with dosing and monitoring handled by clinicians.

Depending on your risk, care may happen in one of two settings:

Outpatient withdrawal management for people with mild to moderate symptoms, low risk of complications, and a supportive person at home, with frequent check-ins.
Inpatient or residential detox for people with severe symptoms, a history of seizures or delirium, serious medical or psychiatric conditions, or use of other substances.

Our guides on detox and what to expect in detox walk through both. Detox treats the physical withdrawal; ongoing care treats the drinking itself. That can include intensive outpatient programs, virtual IOP, or residential rehab, and if anxiety or depression are part of the picture, dual diagnosis treatment. See our alcohol addiction resource for more, and our guide to insurance and rehab to understand coverage.

Find Support Through The Recover

The Recover is a behavioral health referral network that helps people and families find detox, addiction, and mental health treatment that fits their needs, location, and insurance. If you are not sure whether what you are feeling is a hangover or withdrawal, or you are ready to stop drinking safely, you can call 888-510-3898 to talk through your options. If you are worried about someone else, our family support resources can help.

Frequently Asked Questions

What is the difference between a hangover and alcohol withdrawal?

A hangover is the short-term physical and mental aftermath of a single drinking episode. It starts as blood alcohol drops toward zero and usually improves within about 24 hours. Alcohol withdrawal happens when someone whose body has adapted to regular heavy drinking stops or cuts back. It usually begins 6 to 24 hours after the last drink, often gets worse over the next one to three days, and can lead to seizures or delirium. Withdrawal can be dangerous; a hangover generally is not.

Can you get alcohol withdrawal after one night of drinking?

Clinically significant withdrawal usually follows sustained heavy drinking, typically over more than a couple of weeks, rather than a single night. One night of heavy drinking normally causes a hangover. However, people who drink heavily most days can feel withdrawal symptoms after even a short break, and some of what they call a hangover may actually be early withdrawal.

Are shakes after drinking a hangover or withdrawal?

Mild shakiness can happen with a hangover, often from low blood sugar and poor sleep, and it usually settles after eating and resting. A noticeable tremor in the hands that appears every morning, gets worse over a day or two, or is calmed by having a drink is a classic sign of alcohol withdrawal and should be discussed with a medical provider.

How long does a hangover last compared to withdrawal?

Most hangovers fade within 24 hours. Acute alcohol withdrawal usually peaks within 24 to 72 hours of the last drink and improves over about four to seven days, though sleep problems, anxiety, and low mood can linger for weeks. Symptoms that are still building on day two or three point toward withdrawal rather than a hangover.

Does drinking make a hangover go away?

Drinking more, sometimes called a “hair of the dog,” may briefly mask hangover symptoms but delays recovery. If a drink reliably makes shaking, sweating, nausea, or anxiety disappear, that is a strong sign of physical dependence and withdrawal, not an ordinary hangover.

When is alcohol withdrawal an emergency?

Call 911 for a seizure, confusion or disorientation, hallucinations, severe agitation, a high fever with heavy sweating, chest pain, fainting, or inability to keep fluids down. Alcohol withdrawal delirium, formerly called delirium tremens, is a medical emergency that can be fatal without treatment.

Is it safe to stop drinking cold turkey?

For people who drink lightly or occasionally, stopping is generally safe. For people who drink heavily or daily, have gone through withdrawal before, or have had a withdrawal seizure, stopping suddenly can be dangerous. Talk with a medical provider first. Many people can be treated safely through outpatient withdrawal management, while others need inpatient detox.

How do doctors tell a hangover from withdrawal?

Clinicians ask about drinking patterns, the timing of the last drink, past withdrawal, and other substances, then check vital signs such as heart rate, blood pressure, and temperature. They may use a structured tool such as the CIWA-Ar scale to measure symptom severity and order blood work to check electrolytes, blood sugar, and liver function.

Sources

Verster JC, Scholey A, van de Loo AJAE, Benson S, Stock AK. Updating the Definition of the Alcohol Hangover. Journal of Clinical Medicine, 2020. https://researchportal.northumbria.ac.uk/en/publications/updating-the-definition-of-the-alcohol-hangover/
Muncie HL, Yasinian Y, Oge’ L. Outpatient Management of Alcohol Withdrawal Syndrome. American Family Physician, 2013;88(9):589–595. https://www.aafp.org/afp/2013/1101/p589
American Society of Addiction Medicine. The ASAM Clinical Practice Guideline on Alcohol Withdrawal Management, 2020. https://www.asam.org/docs/default-source/quality-science/the_asam_clinical_practice_guideline_on_alcohol-1.pdf
StatPearls. Alcohol Withdrawal Syndrome. NCBI Bookshelf. https://www.ncbi.nlm.nih.gov/books/NBK441882/
PsychDB. Alcohol Withdrawal (DSM-5 criteria). https://www.psychdb.com/addictions/alcohol/3-withdrawal
Verster JC, et al. Differences in the Temporal Typology of Alcohol Hangover. Alcoholism: Clinical and Experimental Research, 2018. https://dspace.library.uu.nl/handle/1874/375041
SAMHSA. Protracted Withdrawal. Substance Abuse Treatment Advisory, 2010. https://library.samhsa.gov/product/protracted-withdrawal/sma10-4554
Mayo Clinic. Hangovers: Symptoms and Causes. https://www.mayoclinic.org/diseases-conditions/hangovers/symptoms-causes/syc-20373012
988 Suicide & Crisis Lifeline. https://988lifeline.org/

Medical Disclaimer

This article is for educational purposes and is not a substitute for professional medical advice, diagnosis, or treatment. If you think you may be having a medical emergency, call 911. Learn how we create and review content in our editorial standards and medical review policy