Mouth tape is a piece of tape placed over the lips before sleep to keep the mouth closed, encouraging nasal breathing during the night. This practice is known as mouth taping. It aims to promote breathing through the nose rather than the mouth, which is believed to have benefits like reducing snoring, preventing dry mouth, improving sleep quality, and possibly enhancing oral health. The rationale behind mouth taping is that nasal breathing filters, humidifies, and warms the air inhaled, which can be better for respiratory health compared to mouth breathing that may dry out the mouth and cause issues like bad breath and dental problems. Although mouth taping has gained popularity on social media and among wellness circles, scientific evidence supporting its broader health benefits is limited. Some small studies suggest it might help reduce snoring and symptoms of mild obstructive sleep apnea, but more research is needed to confirm these effects. Mouth taping is not suitable for everyone, especially individuals with untreated sleep apnea, chronic nasal congestion, or difficulty breathing through the nose, as it can cause discomfort, skin irritation, or breathing difficulties. It's advised to consult a healthcare professional before trying this practice. Specially designed medical-grade, breathable, hypoallergenic tape is recommended rather than common adhesive or duct tape for safety and comfort. In summary, mouth tape is used as a simple aid to promote nasal breathing during sleep by taping the mouth closed, but its benefits are mostly anecdotal, and it should be used cautiously and with medical advice if there are underlying health issues.