Skin-attachable actuators must maintain strong adhesion and stable vibrotactile feedback under extreme skin deformation, yet conventional haptic systems operate only near narrow resonance frequencies and suffer from mechanical mismatch and damping. These limitations reduce performance on highly deformable body regions. Here, we present an intrinsically stretchable skin-adhesive actuator (ISSA) with a multiphase dielectric architecture integrating an isotropic spring matrix and an anisotropic elastic damper matrix, enabling stable vibration beyond resonance. A hybrid 1D/0D percolated electrode supports strains exceeding 500% with reliable electrical performance. A frog-inspired adhesive layer provides breathable, robust shear adhesion (~28.4 kPa). With seamless integration and an ultralow effective modulus (<24 kPa), the ISSA conforms closely to skin and delivers high-fidelity vibrotactile feedback for advanced haptic applications.