Does the subject want to ask, "Can Farman Bone Collagen Mask be used after it expires?" ? It doesn't work. After the expiration of farman Collagen Mask, its ingredients will deteriorate, which will not only lose its original protective effect on the skin, but also cause skin problems such as skin allergy, and the most important thing is disfigurement. Therefore, the expired Farman collagen mask must not be used on the face.