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According to a 2023 survey of 2,005 adults who had recently tried sleep trends, more than one in 10 people had tried mouth taping. People admit to trying the trend to stop snoring, reduce mouth breathing, and for some—to change their face shape. Some videos on the social platform claim that mouth taping improves the jawline and reduces the appearance of a double chin.

Despite the online popularity of the sleep trend, the medical evidence to support this practice is scant, says Indira Gurubhagavatula, professor of medicine at Perelman School of Medicine at University of Pennsylvania, and spokesperson for the American Academy of Sleep Medicine.

Instead, mouth taping may actually cause health problems.