Among all unanswered questions in Physics, like quantization of the gravity, fields unification, and so on, the question of the particle masscreation and its mass quantization deserve special attention. This paper is about the evolution of the physical particle-supported by the electro and gravity forces. Unexpectedly, electric charge and gravity unify into electro-gravity interaction in the presence of the Planck masses on a very fundamental level,making the electric charge, gravity, and mass inseparable entities. Moreover, electro-gravity necessarily polarises the Planck masses. Particles are created from the vacuum. The principle of the minimum of the static action creation introduces the evolution time derivative, which further defines the particle tangent space and its evolution kinetic energy. The particle self-interaction energy is its electro and gravity interaction energy. All of this is necessary and sufficient to write the first-order, nonlinear particle evolution equations for its electro and gravity interactions and the mass state variables. The article contributes to the particle polarization classification, the two-dimensional particle internal geometry, and its internal space and time. In addition, it contributes to the implicit mass solutions for some particular interaction cases, and describes the character of the particle development in the general case.And finally, the article predicts the universal mass unit $ Um = mathbf{0.565}, big[textrm{meV}cc^{-2}big],$consistent with mass $m_{u_{e}}=1.17,meV,$ of the lightest, the electron neutrino.