Is an Infrared Sauna Safe for Kids? Age, Time and Rules
Is an infrared sauna safe for children? For healthy school-age kids and teenagers it can be, in much shorter, cooler sessions than adults use and with an adult keeping watch. Babies and toddlers should not use one.
Children regulate heat less efficiently than adults: more skin surface for their body weight, a lower sweat rate, and a faster rise in core temperature. They need shorter, cooler, supervised sessions, and infants and toddlers should not use a sauna at all. There is no single official age limit.
This is general information, not medical advice. Ask your child's doctor before your child uses a sauna.
- 01There is no official minimum age. Any number you see is a house rule or a rule of thumb.
- 02The pediatric research is a few Finnish studies from 1988 to 1991, all on traditional saunas. Infrared data for children is essentially absent.
- 03Babies and toddlers stay out and preschoolers are best kept out. School-age children get short, cool, supervised sessions, and teens stay shorter and cooler than adults.
- 04Stop at the first sign of dizziness, headache, nausea, flushing or pallor, confusion, or unusual tiredness.
Why Children Handle Heat Differently
A child is at a disadvantage in a hot cabin. Children have more skin surface relative to body weight than adults, so in a space hotter than the skin they take on heat faster for their size. They also sweat less, and evaporating sweat is the main way anyone cools down in a sauna. The result is a core temperature that rises faster than an adult's in the same heat.
Younger children also tend not to notice or say that they feel unwell, and may want to stay because a parent or sibling is still inside.
Infrared does not remove the problem. The cabin air is cooler than in a traditional sauna, but the heaters warm the body directly, and what matters is how far core temperature climbs. Our infrared sauna pregnancy safety guide rests on the same point: a cooler cabin is not automatically a safer one.
Is There an Age Limit for Infrared Saunas?
No. There is no single official sauna age limit, infrared or traditional. In 1988, pediatric researchers at the University of Turku noted that there were no established guidelines for safe sauna use by infants and children, even though Finnish children are introduced to the sauna in early infancy. Gyms, spas and sauna makers may set their own age rules, which are worth following, but those are house rules, not medical cutoffs.
The same paper describes Finnish practice: parents set limits from experience, watch how their children behave afterward, and rarely let a child into a sauna alone before age 7. That is a custom about going in alone, not a finding about when going in becomes safe.
So can kids use an infrared sauna? The working answer: babies and toddlers stay out, preschoolers are best kept out, and older children get a shorter, cooler, supervised version of an adult session.
What the Research Actually Looked At
The research on children in saunas is small and old: a few Finnish pediatric papers from 1988 to 1991, all about traditional saunas, not infrared cabins.
Researchers in Turku gave children, teens and young adults 10 minutes of heat in a climate chamber matched to an ordinary Finnish sauna. Body temperature and heart rate rose in everyone. In children under 10, blood pressure fell right after the heat, and two participants fainted. In the under-5s, each heartbeat pumped about a third less blood. The authors concluded that small children in particular need careful supervision.
The same group recorded ECGs under the same conditions. More than half of participants showed ECG changes typical of a fight-or-flight response during the heat, and a few children had extra heartbeats. One previously healthy five-year-old had a pause of a few seconds in her heartbeat. The authors called the changes temporary and benign, but warned that sauna heat may be risky for children with disorders of the heart's natural pacemaker.
Over 1,200 Finnish families answered a questionnaire about their children's sauna habits. Nearly every child used the sauna, most had started in infancy, and symptoms were rare and not serious, mostly brief dizziness or nausea. One finding stands out: about half of the children with eczema got worse in the sauna. The authors saw no significant immediate harm to healthy children.
None of these studies used an infrared cabin, and infrared-specific research on children is essentially absent, so applying these results to infrared is an extrapolation, including in this guide. The wider evidence, summarized in a 2018 Mayo Clinic Proceedings review, comes almost entirely from adults in traditional Finnish saunas.
Practical Rules by Age
No study has defined safe limits for children in infrared cabins, so these are cautious rules of thumb, not research limits. The idea is simple: no child's session should be harder than an adult's very first one.
Our guide on how long to stay in an infrared sauna starts adult beginners at 15 to 20 minutes, and the infrared sauna temperature guide puts a first session at roughly 105 to 115 F (41 to 46 C). Children should get less time than that and no more heat.
Stay out, even held by a parent. Babies and toddlers cannot say they are too hot or get out alone.
If a doctor agrees: a few minutes at most, lowest comfortable setting, an adult right beside them.
About 110 F (43 C) or lower, with an adult in the cabin or watching the whole time.
About 115 F (46 C) or lower. Shorter and cooler than adult sessions, with someone else at home.
Rules That Apply at Every Age
- +Never alone, never locked in. An adult stays with younger children, every child can push the door open, and the sauna is switched off after use so it is not a play space.
- +Water before and after. A drink before going in, water within reach, and another drink after.
- +Out at the first complaint. Children can leave at any time, and an adult leaves with younger ones. Feeling fine is not a reason to add minutes.
- +Hands off the heaters. Ceramic heater elements in particular can burn, and no child should sit pressed against a panel.
- +Keep watching afterward. In the 1990 study, blood pressure in younger children fell right after the heat, not during it.
Teenagers and Infrared Saunas
Parents are most tempted to apply adult rules to teenagers, because a 15-year-old may already be adult-sized. Size is not the whole story: sweating capacity keeps developing through puberty, and teens are more likely to use the sauna alone, after hard training, or already short on fluids. Keep their sessions shorter and cooler than adult ones, with someone else at home and water beforehand.
One use to rule out entirely: sweating off weight before a sports weigh-in. That is deliberate dehydration on top of heat stress.
Warning Signs: When to Stop Immediately
End the session straight away if a child shows any of these:
- !Dizziness or unsteadiness
- !Headache
- !Nausea or vomiting
- !Flushed or unusually pale skin
- !Confusion or muddled answers
- !Unusual tiredness or floppiness
- !In younger children: crying, crankiness or going quiet
Our guide to infrared sauna side effects covers the same overheating risks in adults, but a child can go from fine to unwell faster, so do not wait to see if a symptom passes.
Get the child out, let them lie down somewhere cool, loosen tight clothing and give small sips of water. Cool the skin with damp cloths. Confusion, fainting or repeated vomiting mean calling emergency services, not waiting to see.
Children Who Should Not Use a Sauna
Some children should skip the sauna, or use one only after a pediatrician says yes:
- ×Heart conditions, including known rhythm problems.
- ×Epilepsy or a history of seizures, including seizures with fever.
- ×Fever or any current illness, especially vomiting or diarrhea.
- ×Medicines that affect heat tolerance, such as stimulant ADHD medications, some anti-seizure drugs and sedating antihistamines.
- ×Eczema, which got worse in the sauna for half of the children who had it in the 1989 survey.
- ×Any child who cannot reliably say they feel unwell or get out on their own.
If you are unsure whether a condition or medicine matters, ask your child's doctor before the first session, not after.
Are There Benefits for Kids?
Not in any proven sense. The benefits in our infrared sauna benefits guide come from research on adults, and there is no good evidence they carry over to children. For a child, a sauna is a warm family ritual, not a treatment, so there is never a reason to push a session longer.
FAQ
At what age can a child use an infrared sauna?+
How long can a child stay in an infrared sauna?+
Is an infrared sauna safe for teenagers?+
What temperature is safe for kids?+
What are the warning signs a child is overheating?+
- Children in sauna: cardiovascular adjustment. Pediatrics, 1990.
- Children in sauna: electrocardiographic abnormalities. Acta Paediatrica Scandinavica, 1991.
- Sauna habits and related symptoms in Finnish children. European Journal of Pediatrics, 1989.
- The sauna and children. Annals of Clinical Research, 1988.
- Cardiovascular and Other Health Benefits of Sauna Bathing: A Review of the Evidence. Mayo Clinic Proceedings, 2018.
We do not run a test lab. Figures on this page come from the sources above, from published manufacturer specifications, or are reasoned estimates that are labelled as such.
