A blood choke is a technique used in martial arts and self-defense that restricts blood flow to the brain by applying pressure to the carotid arteries. This can lead to unconsciousness if maintained for a short period. Blood chokes are often employed in grappling sports like Brazilian Jiu-Jitsu and mixed martial arts. Unlike airway chokes, which block breathing, blood chokes target the blood vessels. They can be effective for quickly incapacitating an opponent without causing long-term harm. Proper training and understanding of these techniques are essential to ensure safety and effectiveness during practice or competition.