Walk into a home in the Gulf and fragrance may reach you before anything else does. Sometimes it comes from perfume or oud oil; sometimes from a trail of fragrant smoke rising from an incense burner.

That smoke is often bakhoor, a form of traditional Arabic incense closely associated with homes, hospitality and personal fragrance across the Gulf and wider Arab world. It can perfume a room, settle into clothes and hair, welcome guests or accompany a special occasion.

But what is bakhoor, exactly? It is easy to confuse it with oud, particularly because the two often appear together. Here is what goes into it, how it is traditionally burned and why the ritual has endured.

The simplest bakhoor meaning is incense. Bakhoor — also transliterated as bukhur or bakhour — comes from the Arabic بخور, a word used for incense.

Bakhoor incense commonly consists of wood chips or a wood-based mixture combined or infused with fragrant oils and other aromatic ingredients. Depending on the preparation, it may appear as chips, loose material or compressed pieces.

Rather than being lit like an incense stick, bakhoor is generally placed over a heat source so that it releases fragrant smoke.

There is no single universal bakhoor fragrance, either. One blend might be intensely woody and smoky, while another leans towards rose, musk, sandalwood, spices or sweeter perfume notes. Recipes vary between producers and fragrance traditions.

Ask what is bakhoor made of and oud will probably be one of the first ingredients mentioned — but it is not the whole story.

Oud, or agarwood, is a highly prized aromatic material produced primarily by trees from the Aquilaria and Gyrinopsgenera. Resinous deposits develop in the wood, creating the characteristic fragrant material that is used for incense and perfume.

Bakhoor, however, does not follow one fixed formula. Wood can be combined with fragrance oils and ingredients such as sandalwood, rose, musk, resins, saffron and other aromatic materials.

There is good evidence for this variety in Emirati heritage. Abu Dhabi Culture records agarwood, amber, rose oil, saffron water, white amber and sandalwood among ingredients traditionally used in Emirati incense, with sandalwood remaining an important component of bukhour blends.

So two boxes labelled Arabic bakhoor can smell completely different — much as two perfumes can share a format without sharing a formula.

The two terms overlap in the world of Middle Eastern fragrance, but they do not mean quite the same thing.

Oud generally refers to agarwood itself or, depending on context, the aromatic oil derived from it. Pieces of agarwood can also be heated or burned for their fragrance.

Bakhoor is a broader incense preparation. It can contain oud alongside other woods, perfume oils, florals, resins and spices, while some preparations may be based on other aromatic materials.

That is the useful difference between oud and bakhoor: oud is a particular aromatic material, whereas bakhoor describes a type of incense preparation. In practice, terminology and recipes vary, so the boundary is not always as neat as fragrance-shop labels might suggest.

Fragrance has an important social role in many Gulf households, which helps explain why bakhoor is used in Arab culture far beyond simply making a room smell pleasant.

In a majlis, fragrant smoke may be used as part of welcoming guests, and an incense burner can be offered so people can allow the scent to perfume their clothing. Bakhoor is also used to fragrance homes and garments and around celebrations and special occasions.

There is no single set of bakhoor traditions followed across every Arab country or household. Practices differ by place, family and occasion.

What recurs particularly strongly in the Gulf is the relationship between fragrance, preparation and hospitality: scenting a space before guests arrive, perfuming clothes before going out or associating a particular aroma with gatherings and celebrations.

That helps explain the continuing place of bakhoor in Arab culture even alongside modern perfumes, candles and diffusers. The ritual carries a social dimension that goes beyond home fragrance alone.

The history of bakhoor belongs within a much older regional relationship with incense and aromatic materials — but the two histories should not be treated as identical.

Arabia participated in major fragrance trade networks long before the modern perfume industry. UNESCO's Land of Frankincense in Oman documents the production and trade of frankincense through ancient caravan routes and ports, demonstrating the historical importance of incense to the region.

Frankincense, however, is not bakhoor, and this evidence does not mean today's prepared bakhoor blends can simply be traced unchanged back to antiquity.

Agarwood has its own history. The trees that produce it are native primarily to South and Southeast Asia, and CITES documentation records written references to agarwood use in Arabian texts by around the ninth century. It later became deeply embedded in regional fragrance practices and remains highly valued as incense and perfume material.

The safest way to understand the significance of incense in Middle Eastern culture, therefore, is as a long and evolving fragrance tradition. Materials, recipes and terminology changed as aromatics moved through trade networks and different local practices developed.

Modern bakhoor sits within that history rather than representing one recipe preserved unchanged for thousands of years.

Traditionally, bakhoor is heated in a mabkhara — an incense burner designed to hold the heat source and aromatic material.

If you are learning how to use bakhoor, there are two common approaches today: charcoal and an electric incense burner.

With the traditional method, charcoal is lit and placed inside a suitable heat-resistant mabkhara. A small amount of bakhoor is then placed over the hot charcoal, releasing its aromatic smoke.

Electric burners heat the incense without charcoal or an exposed flame. They can be more convenient for home use, although the experience and resulting scent may differ from the traditional method.

Either way, start with a small amount. Bakhoor fragrance can become intense surprisingly quickly, particularly in a smaller room.

If you are learning how to burn bakhoor at home, remember that you are dealing with both a hot burner and, with the traditional method, combustion.

Place the mabkhara on a stable, heat-resistant surface away from curtains, paper and other flammable materials. Use appropriate tongs to handle charcoal and never leave a hot burner unattended or within easy reach of children or pets.

Ventilation is sensible too. Research on incense combustion identifies it as a source of indoor particulate matter, although emissions and exposure vary considerably according to the incense, amount burned, room and ventilation. Opening a window and avoiding filling a closed room with heavy smoke is a simple precaution.

If you use the smoke to perfume clothing, keep the fabric safely above the burner rather than bringing it close to the charcoal or heating element. The mabkhara can remain hot after the visible smoke has disappeared, so allow it to cool completely before handling or storing it.

Perhaps the most distinctive thing about bakhoor incense is the way it moves between home and personal fragrance. Smoke perfumes a room, but its scent can also remain on clothing and hair long after the burner has been put away.

That physical quality helps explain why scent can become so closely tied to particular homes, people and occasions.

Technically, the answer to what is bakhoor is relatively straightforward: an incense preparation heated to release aromatic smoke. Culturally, it belongs to a much broader regional relationship with fragrance — shaped by oud, sandalwood, florals, resins and centuries of exchange, and still expressed through the everyday rituals of preparing yourself and your home for other people.