This paper uses advanced electromagnetic simulations of human skin microstructure to model exposure to realistic pulsed 5G/6G signals at 3.5, 27, 77, and 300 GHz. It reports localized, inhomogeneous absorption patterns linked to sweat glands and blood vessels, suggesting that treating skin as homogeneous may miss hotspots. The authors conclude that SAR-based standards may be inadequate for mmWave/sub-THz exposures and could underestimate potential risks, including possible nerve excitation.