Boxing and other combat sports are associated with repetitive head trauma related to damage to the central nervous system. This work aimed to model the effect of a punch to the forehead given by a heavyweight boxer. Methodology: the Finite Element Method (FEM) was used. The research was based on simulating the effects of a dynamic impact and thus predicting, locating, and quantifying changes in the brain due to the blow. This simulation was validated by comparing medical research on brain injuries caused by impacts to the head. Results: The mathematical predictions showed significant brain effects: figures that exceed 100% risk. The MEF appears to be a practical, universal, inexpensive, and quick calculation tool, with important applications to detect evidence of brain trauma.