Why are strikes to the back of the head illegal in mixed martial arts?

Strikes to the back of the head are prohibited in mixed martial arts primarily to enhance athlete safety and reduce the risk of severe injury.

As the sport evolved, regulatory bodies—such as the Nevada State Athletic Commission and the New Jersey State Athletic Control Board—implemented the Unified Rules of Mixed Martial Arts to standardize competition and minimize dangerous practices. Because the back of the head and the spine are highly vulnerable areas, strikes to these regions are classified as illegal fouls alongside other prohibited actions like eye gouging, biting, and throat strikes.1

The enforcement of these rules is a fundamental ethical commitment to the well-being of the participants, ensuring that the sport remains a test of skill and athleticism rather than a venue for life-threatening trauma. Referees are empowered to issue warnings, deduct points, or disqualify fighters who commit these flagrant fouls to maintain a safe competitive environment.1