Short answer: no, a sauna is not a good hangover cure. You can't sweat out alcohol in any meaningful amount, and sitting in strong heat while your body is already low on fluids makes dehydration, dizziness and fainting more likely. The National Institute on Alcohol Abuse and Alcoholism (NIAAA) puts it plainly: there is no cure for a hangover other than time. Water, food and rest help you get through it more comfortably. Save the sauna for a day when you feel well.
This guide explains what a hangover does to your body, why heat adds to the strain, and what to do instead. If you still want a gentle warm-up later in the day, there's a careful checklist near the end.
What is a hangover?
A hangover isn't one problem. It's several things happening at once after heavy drinking. According to the NIAAA:
- Mild dehydration. Alcohol makes you pass more urine, and the fluid loss adds to thirst, tiredness and headache.
- Poor sleep. Alcohol may help you fall asleep, but sleep later in the night is broken up, so you wake up tired.
- Stomach irritation. Alcohol irritates the stomach lining and increases acid, which can cause nausea and pain.
- Inflammation. Alcohol increases inflammation in the body, which adds to feeling unwell.
- Acetaldehyde. Your liver turns alcohol into acetaldehyde, a toxic, short-lived byproduct.
Your liver does almost all the work of clearing alcohol, at its own pace. Nothing you do, including sweating, makes it go much faster.
Why a sauna can make a hangover worse
More fluid loss when you're already low
Sauna heat makes you sweat heavily. When you start the day short on fluids, losing more water and salt through sweat can leave you dizzier, more tired and more headachy, not less. The sweat is mostly water and salt. The amount of alcohol or acetaldehyde that leaves through your skin is tiny compared with what your liver handles.
Blood pressure drops and fainting
Heat widens blood vessels, and so does alcohol. Harvard Health notes that blood pressure in a sauna is unpredictable, rising in some people and falling in others. A fall in blood pressure is what makes you feel faint when you stand up, and in a hot, small room with a hard bench, a faint can mean a fall and an injury.
Alcohol and sauna accidents
This is the most serious point. A 2018 systematic review of sauna research (Hussain and Cohen, Evidence-Based Complementary and Alternative Medicine) notes that sauna-related deaths are rare, but that half or more of the deaths reported in Finland and Sweden involved alcohol, and bathing alone was a common risk factor. That's why Harvard Health advises avoiding alcohol before and after a sauna session.
Harder to notice overheating
Alcohol dulls judgment and makes it harder to notice warning signs. A hangover also comes with headache, nausea and tiredness, which look a lot like the early signs of heat exhaustion. It's easy to miss the point where you should get out.
What actually helps a hangover
No remedy has been proven to cure a hangover, but these steps help many people feel better while time does its work.
| Step | Why it helps | Tips |
|---|---|---|
| Drink water steadily | Replaces fluid lost overnight | Sip through the morning. An electrolyte drink or broth can help if you've been sick. |
| Eat something bland | Easier on an irritated stomach | Toast, crackers, rice, bananas or soup. |
| Rest or nap | Makes up for broken sleep | Keep the day light if you can. |
| Be careful with pain relievers | Some don't mix well with alcohol | The NIAAA warns that alcohol plus acetaminophen can be toxic to the liver, and aspirin or ibuprofen can irritate the stomach. Check the label or ask a pharmacist. |
| Skip "hair of the dog" | More alcohol only delays recovery | Give your body the day off. |
The only sure way to avoid a hangover is to drink less, or not at all. Alternating alcoholic drinks with water and eating before and while you drink can help.
If you still want to use a sauna later
We don't recommend a sauna while you're hungover. If you're thinking about a gentle session later in the day, only do it when all of these are true:
- You're fully sober. If there's any chance alcohol is still in your system, skip it.
- Your symptoms have passed. No headache, nausea or dizziness, and you've eaten and kept fluids down.
- You're well hydrated. You've been drinking water through the day, and you bring water with you.
- You keep it short and mild. Use a lower temperature and a shorter session than usual. Our guide to safe sauna session times covers how long to stay in.
- Someone knows you're in there. Don't use a sauna alone after a night of drinking.
- You get out at the first warning sign. Dizziness, a pounding heart, nausea or feeling unusually hot means it's time to leave, cool down and drink water.
New to saunas? Read how to use a sauna first, and remember that people with heart disease or uncontrolled high blood pressure should check with a doctor before using one at all.
When to get medical help
Most hangovers pass within a day. Get help right away if someone has signs of alcohol poisoning, such as confusion, vomiting that won't stop, seizures, slow or irregular breathing, or can't be woken. Call 911.
In a sauna or any hot space, the CDC lists signs of heat exhaustion as heavy sweating, cold and clammy skin, a fast weak pulse, nausea, dizziness, headache and fainting. Move to a cool place and sip water, and get medical help if symptoms get worse or last more than an hour. Confusion, slurred speech or passing out can mean heat stroke, which is an emergency: call 911.
The bottom line
A sauna can't speed up how fast your body clears alcohol, and heat on top of a hangover adds risk without real benefit. Drink water, eat something gentle, rest, and let time do the rest. When you feel well again, a sauna can be a relaxing part of your routine. If you're curious what the research does and doesn't support, see our guide to infrared sauna benefits. The same caution applies when you're sick: read why it's best to skip the sauna with a cold or the flu.
