Sleep wrinkles are formed by repeated pressure of the face against the pillow, independent of facial expressions, and become permanent with the loss of skin elasticity.

noli's read

Scientific literature, notably observational studies published in the Journal of Cosmetic and Laser Therapy, confirms that the mechanical forces exerted during sleep (compression and shear) can effectively contribute to the formation of specific wrinkles, distinct from expression lines. The mechanism relies on the deformation of facial soft tissues for several hours each night, which becomes more pronounced with natural aging and the decrease of elastin fibers. While the link between sleep position and skin impressions is biologically plausible and documented, the extent of the phenomenon varies considerably depending on the individual, their skin type, and their habits. The post does not make an unfounded medical claim, but highlights a clinical observation recognized in aesthetic dermatology. It is, however, important to note that these wrinkles are multifactorial and that pressure is only one element among others (genetics, sun exposure). The suggested approach is therefore a logical prevention based on the reduction of mechanical stress.

the sources

No named source held this one up — that absence is part of the verdict.