A head-mounted impact sensing and warning device includes a band adapted to be worn around at least a portion of the head or helmeted area of a user an impact sensing device configured to sense an impact sustained by the head or the helmeted area of the user at least one visual indicating device operatively coupled to the impact sensing device, the at least one visual indicating device configured to produce a visual indicator when the impact sensing device senses an impact that exceeds a predetermined impact level, thereby providing a visual alert that the impact sustained by the head or the helmeted area of the user exceeded the predetermined impact level and a unit housing containing the impact sensing device and the at least one visual indicating device, the unit housing being coupled to the band or the helmeted area.