Can BJJ cause concussions?

Concussions in BJJ are less frequent than in boxing or MMA but do happen. Common mechanisms include head-to-head collisions during takedown attempts, your head hitting the mat during a hard sweep or throw, accidental knees or elbows to the head during scrambles, and being cranked or compressed in ways that jar the brain. Symptoms of concussion include headache, dizziness, confusion, nausea, sensitivity to light or noise, memory problems, and mood changes. If you experience any of these after head impact during training, stop immediately and inform your instructor. Do not return to training until symptoms fully resolve and you have been cleared by a medical professional. The consensus on concussion management is rest and gradual return to activity. Repeated concussions are cumulative and increasingly dangerous. Wearing a mouth guard may provide some protection by cushioning the jaw. Strengthening your neck also helps absorb impact. Report all head impacts during training, even if you feel fine at the time, because concussion symptoms can be delayed.