I recently bumped heads with another player during a rugby match, i keep getting frequent painful headaches at the side of my head. what should i do?

Stop playing until..: You see your doctor. You are having symptoms of a concussion and you'll need to see your doctor. It is very important that you don't play until checked out. This is because a concussion causes damage to the brain, which needs to heal. If you get a second concussion while this healing is incomplete, you might get severe damage or death. Good luck.