I have had a tooth broke in half foe awhile it would hurt for a little bit then stop but now it is hurting me all the time it had stopped hurting this morning then tonight it started hurting again but also now my lower lip on the left side of my face is going numb but          the tooth is still hurting. Why is my lip going numb.
Thanks for your query, I have gone through your query. The pain in the tooth can be because of the fracture involving the pulp where the nerves and blood vessels will be there. Once you eat or Chat Doctor.  So consult an oral physician and get a radiograph to rule out the tooth infection and get the tooth treated with RCT and crown. The numbness in the lip can be because of the pressure over the nerve by an impacted wisdom tooth, or it can be because of the nerve injury by any trauma. If I am your treating doctor, I would have suggested you to get a radiograph like OPG to rule out both the problems.Meanwhile, I would have suggested you to take course of antibiotics like amoxicillin 500\u00a0mg and metronidazole 400\u00a0mg TID for 5 days (if you are not allergic) for the tooth infection. And capsule erosion once daily for 15\u00a0days for the numbness in the lip. I hope my answer will help you, take care.