Causes Of Wrinkles (predictable locations)

They appear in predictable locations due to the underlying superficial musculoaponeurotic system (SMAS), and are usually distinct from wrinkles of facial expression. As with wrinkles of facial expression, sleep wrinkles can deepen and become permanent over time, unless the habitual sleeping positions which cause the wrinkles are altered. The wrinkles that occur in skin after prolonged exposure to water are sometimes referred to as pruney fingers or water aging.