Answered by Ustadh Tabraze Azam
Question: Assalam alaykum,
Would the burning of incense during fasting hours in Ramadan invalidate the fast?
Answer: Wa alaikum assalam wa rahmatullah,
No, burning incense in and of itself does not invalidate your fast. Rather, the deliberate intake of something which has a perceptible body, like the smoke arising from the burning, through the mouth or nose would be invalidating.
However, if this is avoided, then there is no harm in burning such incense during the fasting hours; just as there is no harm in taking a hot shower or sitting in a waiting room full of smokers as such passive inhalation is unavoidable.
[Shurunbulali, Maraqi al-Falah (2.323)]
Please also see: The Complete Guide to Fasting
And Allah Most High alone knows best.
Checked & Approved by Shaykh Faraz Rabbani