Why Candling Can't Work
Since wax is sticky, the negative pressure needed to pull wax from the canal would have to be so powerful that it would rupture the eardrum in the process. However, candling produces no vacuum. Researchers who measured the pressure during candling of ear models found that no negative pressure was created. The same investigators candled eight ears and found that no ear wax was removed and candle wax was actually deposited in some of them! [3]
The notion that the ear canal is connected to structures beyond the eardrum is false. A review of a good anatomy book should dispel this notion. The external ear canal, with an intact eardrum, is not connected to the brain, the sinuses targeted by the procedure (those above your eyes), or the Eustachian tubes (the passageways between the internal ear and the back of the throat). While some claim that the eardrum is porous and quickly allows impurities to pass through, this is untrue. The "impurities" that appear in the collected wax (usually on a paper plate or other collecting device) are nothing more than the ashes from the burnt wick and wax of the cone itself.
Dangers Reported
Candling poses several dangers, the most serious of which involve burning caused by the hot wax. Candle manufacturers claim that their candles will drip only down the outside of the ear, but shamefully few direct the user to hold the candle horizontally to prevent this. A 1996 survey of 144 ear, nose, and throat physicians, found that 14 had seen patients who had been harmed by ear candling, including at least 13 cases of external burns, 7 cases of ear canal obstruction with candle wax, and 1 perforated eardrum [3].
Another case was reported by The London Free Press, a Canadian newspaper. A woman who experienced stuffiness in the nose and ear pains while scuba diving went to a local health-food store and was referred to a "qualified" candler. During the "treatment," she felt an intense burning in her ear. At the emergency room, attempts to remove wax that had dripped from the candle onto her eardrum failed. Surgery was required, and a hole in her eardrum was discovered, which presumably was caused by the procedure. She recovered fully, and luckily her hearing was not affected. The practitioner apologized, compensated the woman, and stopped performing ear coning.
Alaska Fire Marshall Gary L. Powell has reported two instances of significant fires associated with ear candling., one of which led to the user's death. On January 27, 2005 a 59-year-old woman ignited her bedding when she dropped an ear candle that she was attempting to use the ear without any assistance. The candle ignited the bedding and quickly spread to curtains and other combustibles in the room. The woman did escaped but suffered an asthma attack and died in a hospital emergency room [4].