Feeling perpetually congested? It could be down to mouth-breathing while you sleep, a new study suggests.Breathing through your mouth at night means you are twice as likely to suffer nasal congestion on the regular, compared to those who mostly breathe through their nose, a study found.The survey, conducted for herbal oil company Olbas in conjunction with family practitioner Dr Roger Henderson, asked 2,000 adults about their sleeping and breathing habits.
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