Medical expert of the article
New publications
Toothache after a filling
Last reviewed: 04.07.2025

All iLive content is medically reviewed or fact checked to ensure as much factual accuracy as possible.
We have strict sourcing guidelines and only link to reputable media sites, academic research institutions and, whenever possible, medically peer reviewed studies. Note that the numbers in parentheses ([1], [2], etc.) are clickable links to these studies.
If you feel that any of our content is inaccurate, out-of-date, or otherwise questionable, please select it and press Ctrl + Enter.

Toothache after filling may persist even after a person has breathed a sigh of relief and decided that it will no longer hurt. But the causes of these pains are so unclear that even a doctor or patient cannot determine their nature. For example, the cause of pain may be an allergy to the material of which the filling is made.
Causes toothache after a filling
Toothache after a proper filling can occur for various reasons. If the tooth is properly treated before the filling, the pain after the filling will be mild or non-existent.
Incorrect pre-treatment of the tooth
The tooth may hurt because the doctor treats the cavity where the caries has developed. The carious cavity is also treated or the soft tissues of the tooth, which are called pulps, are removed. The doctor can also treat the root canal of the tooth. It also happens that the doctor treats periodontal inflammation before filling the tooth - this is the ligament that holds the tooth in the desired cell.
These are preliminary operations before filling. When the doctor performs these manipulations, he can injure the tissues. Therefore, after filling, toothache may occur. Usually, this pain is not strong, it can quickly pass, unless the person bites hard food immediately after filling and does not irritate the tooth tissues with hot or cold food. Such pain can last for two weeks, maximum - for two months.
[ 1 ]
Tooth filling technology
A tooth may hurt during filling if the technology is violated. For example, if the doctor uses an excessive flow of light, which treats the tooth surface and the filling itself. The flow of light, if used incorrectly, can destroy the pulp of the tooth, and this causes pain after filling.
If the pain in the diseased tooth continues for two months after the filling is completed, the person may have untreated diseases. For example, pulpitis or periodontitis, or a mismatch of the filling material, which the body perceives as foreign. Then the filling will simply have to be redone, the material replaced.
Toothache after incorrect filling
The cause of toothache due to improper filling may be incorrect treatment before the filling itself. The infection can affect the cavity of the tooth and destroy its hard tissues, affecting the pulp. The infection can reach the very top of the diseased tooth along the root of the tooth – then the pain will become much stronger.
The correct filling technology would be to first treat the diseased tooth, neutralize the infection and inflammation. If the pulp cannot be cured, it must be removed. If the filling is completed without treatment, eliminating the pain that will arise later will require time and complex efforts. If inflamed tissue remains under the filling, the pain will not only bother - the closed inflamed tissues of the tooth will twitch, the person will experience unbearable torment.
The situation with incorrect filling may be different. Toothache may occur if the filling material did not fill the tooth cavity completely. Or if the doctor did not clean all the root canals as needed. In the tooth that has already been filled, there may be fragments of tooth tissue or remnants of soft tissue that rot and infect the entire tooth cavity. And then the pain in the filled tooth will also be much stronger than before the filling.
The doctor's mistake can also be an incorrect, rough opening of the tooth cavity. If it is prepared by cutting off tissues affected by caries, the pulp can be severely injured and become inflamed. The pulp can also be burned and become inflamed. If acid gets on the hard tissues of the tooth during the filling process, this can also end in inflammation and severe pain.
There is also a situation when the doctor did not calculate the shrinkage of the filling material. Then the tooth surface settles, and a gap can form between the crown and the filling, into which bacteria easily penetrate. This also causes inflammation of the pulp and wild, unrelenting pain in the tooth.
If periodontitis is added to this, the temperature can rise to 40 degrees, it will not be easy to bring it down, the person may also suffer from chills. Such pain should not be tolerated under any circumstances, an ambulance must be called immediately. When a person gets to the hospital, he must, first of all, have an X-ray to know the exact cause of the ailment.
An incorrectly placed filling will have to be torn out, the tooth will have to be treated and a new filling will have to be put in its place – but only after all the treatment processes. The filling will initially be temporary – for no more than two weeks, so that no infection gets into the tooth. Then, if there is no pain, a permanent filling is put in.
Allergic symptoms after filling
A person may have an allergic reaction to the silver amalgam that may be used for the filling. If a person is allergic to the filling material, they may experience itching, skin rashes, and other allergy symptoms. In this case, the silver filling should be replaced with composite materials. It is worth noting that allergic reactions to silver fillings are extremely rare, but they do occur.
The symptoms of an amalgam filling allergy are similar to those of a skin allergy. These include skin rashes and itching. Your dentist will need to do a patch test before you begin filling.
Tooth pain after a filling usually subsides within a week or two. In the meantime, it is best to avoid anything that causes tooth pain. If your tooth pain does not subside within two weeks after a filling, or if your teeth become very sensitive, you should see your dentist. Most likely, your dentist will first recommend toothpastes to reduce sensitivity or apply a desensitizing agent to relieve tooth pain. If this does not work, then root canal treatment may be the best solution for severe tooth pain.
Where does it hurt?
What do need to examine?
How to examine?
Who to contact?
Treatment toothache after a filling
After a filling or any other dental treatment, try to avoid taking medications that may cause tooth sensitivity. Follow your dentist’s instructions if you don’t want to make the problem worse. Here are some home remedies you can follow to help relieve tooth pain:
- It is best to stay away from very hot food or very cold drinks. Also, try to refrain from smoking.
- You should avoid eating candy and any type of sweets after dental treatment as this can lead to further pain and may ultimately damage the best dental filling results.
- After a filling, it is best to eat soft foods for a few days.
- Avoid using sealed teeth for chewing. This will ensure that you do not suffer from unnecessary pain.
- It is very important to follow a proper dental routine. Take the time to brush your teeth after each meal. If this is not possible for some reason, rinse your mouth with water or mouthwash.
- Clove oil is one of the most popular and effective remedies for toothache. Dip a cotton swab in clove oil and apply to the affected areas.
- Sea water for rinsing the mouth - a remedy that provides quick relief from toothache after filling. Take a cup of warm water and add a little salt. This will clean, disinfect the oral cavity and the toothache after filling will become less intense.