Spend a day in Bangkok and you will see it everywhere: someone on the BTS, a taxi driver, a grandmother at the market, all holding a small tube under their nose. This is the ya dom (ยาดม), the Thai herbal inhaler – one of the most loved everyday items in Thailand and a favourite souvenir for visitors. Here is everything you need to know.

What is a Thai herbal inhaler (ya dom)?

Ya dom literally means “medicine to smell”. It is a small inhaler filled with aromatic herbs and cooling essential compounds. You hold it under one nostril and breathe in for an instant, clear, refreshing feeling. Thai people use it to:

• feel fresh and alert during a long day or a long drive
• cope with stuffy air, traffic fumes or crowded places
• ease the queasy feeling of car, boat or bus travel
• feel refreshed in hot, humid weather

What is inside a ya dom?

Recipes vary between brands, but common ingredients include:

• Camphor – gives the strong, penetrating aroma
• Menthol – creates the cooling sensation
• Borneol (pim sen) – a cool, camphor-like aromatic prized in Thai and Chinese tradition
• Eucalyptus oil – fresh and clean
• Thai herbs and spices – such as cloves, pepper, cardamom or dried herbs in traditional “bottle” inhalers

Types of Thai inhalers

1. Herbal bottle inhaler (the classic)

A small glass or plastic bottle filled with dried herbs and aromatic crystals. You open the lid and breathe in. Hong Thai is the most famous example.

• Ya Dom Hong Thai Herbal Inhaler Formula 1 (10 g)
• Hong Thai Formula 1 Gem Cap (3 cc) – a pretty pocket size

2. Twin-head stick inhaler

A slim tube with two ends: one to sniff, one to dab a little oil on the temples or under the nose. The most convenient everyday format.

• Hong Thai Formula 1 Twin Head Stick (5 cc)
• Hong Thai Borneol Twin Head Stick (5 cc) – extra cooling

3. Liquid inhaler (pim sen nam)

A clear liquid of borneol, menthol and camphor that you sniff from the bottle or dab on the temples and wrists.

• Hong Thai Pim Sen Nam Roll On (8 cc)
• Thongtong Osoth Pimsen Nam Eucalyptus (5 ml)

How to use a Thai inhaler

1. Open the cap and hold the inhaler just under one nostril – not inside it.
2. Close the other nostril if you like, and breathe in gently.
3. Repeat on the other side. A couple of breaths is usually enough.
4. For liquid types, dab a small amount on the temples, behind the ears or on the wrists.
5. Close the cap tightly after use so the aroma lasts longer.

Safety tips

• For inhalation and external use only. Never swallow – camphor is toxic if ingested.
• Keep out of reach of children. Do not use on babies or young children.
• Avoid contact with the eyes, and do not apply liquid to broken or irritated skin.
• Stop using it if you feel dizzy or notice irritation. People with asthma, epilepsy or who are pregnant should ask a doctor first.
• If you are flying, check your airline’s rules for carrying liquids.

Thai inhaler FAQ

How long does a ya dom last?

With the cap kept tightly closed, a herbal inhaler usually keeps its aroma for several months.

Is a Thai inhaler the same as a nasal decongestant spray?

No. It is a traditional aromatic product that gives a cooling, refreshing sensation. It is not a medicine for nasal congestion or allergies.

Which Thai inhaler is strongest?

Borneol and liquid pim sen nam versions usually feel the most intensely cooling. Herbal bottle inhalers feel warmer and more spicy.

Why do Thai people love inhalers so much?

They are cheap, pocket-sized and instantly refreshing in hot, busy cities – a small habit passed down through generations.

This article is for general information only. These products are traditional aromatic products and are not intended to diagnose, treat, cure, or prevent any disease.