Get your health question answered instantly from our pool of 18000+ doctors from over 80 specialties
159 Doctors Online

By proceeding, I accept the Terms and Conditions

Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

HCM Blog Instant Access to Doctors
HCM BlogQuestions Answered
HCM Blog Satisfaction

What Causes A Large Ulcer In Mouth After Undergoing Root Canal?

I got a larger ulcer in my mouth after my last root canal and finally got it cleared up, now I had problems with my tooth and they redid my root canal and now I have three that are very painful and getting worse, they're on the opposite side of my tooth but wonder if it's from the anesthesia and what I can do to get rid of them
Thu, 25 Jun 2015
Report Abuse
Dentist,  's  Response
Hi Dear,

Welcome to HCM.

Understanding your concern.


Thanks for your query . The ulcers you mention in query occur due to allergic reaction , because of two reasons :-

- Allergy to benzocaine in anesthesia .

- Material used in root canal like formaldehyde and gutta percha .

I would suggest you to :-

- Take over the counter anti histamine drug like benadryl .

- Apply tree tea oils on them .

- Take ibuprofen (if not allergic) or acetaminophen for pain and discomfort.

- Do warm saline rinses twice daily .

If the allergy is due to formaldehyde this will go in few days by its own , because it is a volatile substance .

If ulcers persist for more then week then consult oral pathologist . Doctor will examine physically to rule out infection . Doctor may prescribe another anti allergic like zyrtec or steroid ointment .

If it is due to infection then doctor will prescribe antibiotics or may extract tooth.


Hope your concern has been resolved.

Best Wishes,
Dr. Harry Maheshwari
I find this answer helpful
Note: For further follow up on related General & Family Physician Click here.
Disclaimer: These answers are for your information only and not intended to replace your relationship with your treating physician.
This is a short, free answer. For a more detailed, immediate answer, try our premium service [Sample answer]
Share on
 
Loading Online Doctors....
What Causes A Large Ulcer In Mouth After Undergoing Root Canal?

Hi Dear, Welcome to HCM. Understanding your concern. Thanks for your query . The ulcers you mention in query occur due to allergic reaction , because of two reasons :- - Allergy to benzocaine in anesthesia . - Material used in root canal like formaldehyde and gutta percha . I would suggest you to :- - Take over the counter anti histamine drug like benadryl . - Apply tree tea oils on them . - Take ibuprofen (if not allergic) or acetaminophen for pain and discomfort. - Do warm saline rinses twice daily . If the allergy is due to formaldehyde this will go in few days by its own , because it is a volatile substance . If ulcers persist for more then week then consult oral pathologist . Doctor will examine physically to rule out infection . Doctor may prescribe another anti allergic like zyrtec or steroid ointment . If it is due to infection then doctor will prescribe antibiotics or may extract tooth. Hope your concern has been resolved. Best Wishes, Dr. Harry Maheshwari