Thank you boyla. All of it was helpful. The reason why im getting punched on my chin is just to see weather or not i can take a punch, and you are right its not 10 seconds but def around 5-7... which i know its not normal, i don't really hear anyone saying they got a headache after a jab. Either way, contact with the opponents fist is inevitable. If im getting a headache after just a jab then that really bothers me. Im not extremely unfit either.