DH has asthma and this year is the first the pouring of the candles has really bothered him ALOT. Hence, a big part of the reason I've decided to hang it up. Burning candles do not seem to affect him though. Especially if the FO is Sun Ripened Raspberry from SC! My FIL has extreme asthma and can't even be around a burning candle or any kind of scent, be it cologne, soap etc.