Hello,
At times, it may pain for a week or two after root canal treatment. It may take a week or two for pain to settle after root canal treatment. Ligaments may have got injured during procedure or over instrumentation can lead to pain after procedure which usually regresses after some time. Some high point on the root canal treated tooth can also lead to pain. If pain persists for longer time, then it can be because of failure of root canal treatment. You can take pain meds as prescribed to you by your dentist. If pain persists, then you can consult your dentist. You can take a second opinion too if you want. In case of root canal failure, re-root canal treatment will be required.

hi and welcome to HCM,
Pain after root canal procedure is definitly not normal.
root canal procedure devitalises the tooth completely by removing the infected nerve tissue from the tooth and it disinfects the canals ans seals the root apex from the periapical tissue so there is no chance of pain and infection after the successful root canal treatment.
In your case if the pain is so severe like brain freeze i suspect , some remnants of the infected nerve or canal left unexplored which is causing discomfort.
You can get it confirmed by a x ray done for your upper teeth, accordingly if there is infection root canal should be repeated.
if pain is due to gum infection , deep scaling and root planing of teeth by a dentist will solve the problem.
i hope this helps,
take care.

Hi,
Welcome to the forum.
After a root canal many people have some minor pain for a few days, and it is not uncommon to have the tooth feel a bit tender. This can usually be addressed with over-the-counter pain relief medications like ibuprofen, which reduces swelling.
If pain continues and is not helped by medications, the patient should contact his or her dentist. Sometimes, a root is very narrow and a bit of infection is missed, or there might be an infection elsewhere near the tooth. Severe pain is an indication that something is not right, and the problem should be addressed quickly.
I hope this information has been both informative and helpful for you.
Regards.

dear friend ,
thanx for sharing your concern,

A successfully treated root canal will have no pain, even after two to three weeks of treatment .

it seems in your case some canal has been left unexplored and untreated which is causing you this pain .

you can visit your dentist and get an xray done for the RCT treated tooth .

i would suggest , to go for a second opinion too. in this case you don't have to bear this pain.
after getting root canal done.

it is curable .

get an IOPA done and proceed further .

mean while, take painkiller for two to three days, combiflam sos.

hope this helps,

thanx