Yes, but you can apply it once a day in the first week, once every two days in the second and third weeks, and then reduce it after the fourth week. Because the skin's absorption ability is limited, once a day, the skin can't absorb so much nutrition, so it is a bit wasteful to apply it. You can use the mask every other day, and the frequency of using the mask 2-3 times a week is the best. 1. Best mask time: The best mask time is from 10 to 2 am. Because the metabolism of the human body will slow down at this time, the absorption effect and repair ability of the skin in this state are the best. If you can, go to bed after the mask. Whether you need to wash your face after applying the mask depends on the instruction manual of the mask. Whether you wash your face or not, it will have instructions. General nutrition masks and moisturizing masks can be washed, but some masks, such as those that can whiten and exfoliate and achieve smooth skin in a short time, must be washed. If you don't wash at this time, it will cause skin sensitivity, pore blockage, and even acne, redness, acne or erythema. And don't wash with facial cleanser after washing, wash with warm water, and then use moisturizing cream.