Skin exhibits unique viscoelastic properties, possessing both elastic and viscous characteristics, making the measurement of its mechanical behavior increasingly essential in the fields of healthcare, cosmetics, and robotics. I conducted spherical indentation simulations using ABAQUS by modeling skin as a generalized Maxwell model. I identified inconsistencies in existing formulas when applied to viscoelastic materials and proposed a novel approach using Prony series and contact stiffness to measure viscoelasticity.