Giving my husband oral. Why does it hurt?

Mare

I give my husband oral about 1-2 time a week for a change till the end. He will play with me if I’m not on my period. Sometimes my lower jaw hurt from giving him oral even though I don’t suck much cause my husband don’t like too much suction lol. I just get this stabbing numb feeling in my lower jaw. Anyone experienced it? How do you over come it