ok so obviously you shouldn't leave a candle burning for too long because of safety reason.
But a doctor explained why leaving a candle burning can be dangerous to your health.
The Original video he reacted to was of a woman who said she left her candle burning all night and woke up with BLACK in her nose. Dr Fayez explained:
“That black substance is actually called soot, and it’s a substance that gets produced when you burn candles too long or their stated time. What makes these dangerous is that they get into your lungs and cause damage.”