Can you leave a face mask on overnight? What are the potential downsides?

Face masks should not be left on overnight, as they can irritate the skin. The detailed explanation is as follows:

Leaving a face mask on all night is not recommended. The duration of each application should be limited to about 10–15 minutes. Longer application does not yield better results. While face masks help replenish facial moisture and keep the skin hydrated, leaving them on for too long can impair the skin's ability to breathe and may cause damage. After a certain period, the mask begins to dry out and, when it adheres tightly to the face, it may start drawing moisture from the skin, making it even drier. Leaving a mask on overnight can irritate the facial skin, damage the skin's surface layer, increase sensitivity, and lead to redness and itching.

To achieve effective skincare benefits, it's important to monitor the time spent applying a face mask. Overuse can produce counterproductive effects, so strict time control is essential. If skin damage occurs, seek medical evaluation at a local hospital promptly, and begin appropriate treatment based on an accurate diagnosis.