Incense

Is Agarbatti Smoke Harmful? What Research Says, and How to Burn Safely

Incense smoke is a source of indoor air pollution: research links heavy, regular burning in closed rooms with breathing problems. The risk comes from the amount of smoke and how little air moves, not from the ritual itself. Burning one stick at a time, with a window open, and not every hour of the day keeps exposure low. People with asthma, babies and the elderly should be most careful.

Updated 4 November 2026 · 6 min read

What the research says

When incense burns it releases fine particles and gases, like any smoke. A widely cited scientific review found that long-term, heavy incense use in poorly ventilated homes is associated with airway irritation and asthma symptoms, and that the smoke contains particles small enough to reach deep into the lungs. The World Health Organization counts smoke from burning materials indoors among the causes of household air pollution. What these studies describe is heavy, daily exposure in closed spaces. A short ritual in a ventilated room is a very different situation.

What raises and lowers the risk

Raises exposureLowers exposure
Several sticks at onceOne stick, or a short ritual
Closed doors and windowsA window open, a fan on low
Burning for hours every dayMorning or evening only
Small room, people sleeping in itLarger room, put out before sleep
Heavy perfume-dipped sticksHerb-based, charcoal-free sticks
Babies or asthma in the roomBurn elsewhere or skip on bad days

Who should be careful

  • People with asthma or COPD: smoke can trigger symptoms. Burn rarely, away from them, or use a diffuser instead.
  • Babies and young children: their lungs are still developing. Don’t burn incense in the room where they sleep.
  • Pregnancy and the elderly: keep it short and ventilated.
  • Pets: birds especially are sensitive to smoke.

Keep the ritual, breathe easier

  1. One at a time. One stick is enough for fragrance in most rooms.
  2. Open a window. Even a small gap lets the smoke clear.
  3. Short and intentional. Light it for puja, meditation or winding down, not all day.
  4. Never while sleeping. Put it out before bed. Never leave it burning unattended.
  5. Choose cleaner sticks. Charcoal-free, herb-based sticks avoid burning a charcoal base.
  6. Skip it on bad days. If anyone is wheezing or unwell, light a diya instead.

See a doctor if smoke makes you cough, wheeze or feel breathless. That is a sign to stop burning incense indoors, whatever kind it is.

Charcoal-free incense from Moksae

Frequently asked questions

Is it safe to burn agarbatti every day?

A short daily ritual with a window open is a low exposure for most healthy adults. Daily, hours-long burning in a closed room is what studies link to problems.

Is agarbatti smoke worse than cigarette smoke?

Some studies found incense smoke contains similar kinds of particles, but people inhale far less of it in a short ritual. It isn’t harmless; ventilate and keep it short.

Is charcoal-free incense safe?

It avoids burning charcoal, but it still produces smoke. The same rules apply: one stick, fresh air, not for hours.

Can I burn incense around my baby?

Better not in the same room, and never where the baby sleeps. Burn it in another room with a window open.

Keep reading

Sources

  1. Lin T.C., Krishnaswamy G., Chi D.S. (2008), "Incense smoke: clinical, structural and molecular effects on airway disease", Clinical and Molecular Allergy
  2. World Health Organization, Household air pollution and health (fact sheet)