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The bump is an abscess, the inside of your tooth is rotting and full of bacteria. These bacteria come out of the root of the tooth where the blood supply and nerves went into the pulp of the tooth when it was healthy. When they reach the jawbone the body can detect them (it can't so well when they are in the tooth) and begins to fight them causing pain and swelling and the bump is full of puss.

The root canal work cleans out the inside of the tooth and drains the puss through the hole in the tooth root.

Left untreated the abscess will continue to grow (fed by infection from inside the tooth), destroying jaw bone until it bursts though to the surface of the gum.

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Q: What is a bump over a tooth that needs a root canal?
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Related questions

What happens when your tooth rots underneath a crown?

The decay starts to grow and spread into the denten which is where the nerve is located causing one to then need a root canal. If the tooth can be saved a root canal is done, the tooth is built up and a new crown is placed over the tooth. if the tooth cannot be saved then it is extracted and replaced by a bridge, implant or a partial


Is it normal for a root canal to discolor a tooth?

Yes, teeth that have root canals frequently turn dark over time.


Is a crown always needed after a root canel?

Type your answer here..once a root canal is complete the nerve is removed. thus, no nutrients etc are able to feed to that perticular tooth. over time the tooth becomes brittle and prone to fracture thus a crown is then placed on it to prolong the "lifespan" of the tooth.


What could be the cause of pain in a tooth that had a root canal done through an existing crown over 5 years ago?

Either the root canal was incomplete, (one canal or little channel was left uncleaned, waiting to be infected, most commonly happening on a molar) or the crown is 'leaking' at the margins, letting bacteria enter and eat the existing tooth structure. Or, you may be surprised to find out, it is not the tooth you think it is. Go to your dentist. He may tap your teeth with a metal instrument and find it is the tooth next to it.


Do you need a crown if you have a root canal on a lower left molar performed over a bridge?

If you have a root canal done, most likely you'll need a crown. But if it was done through a bridge, there is already a crown on that tooth. A bride is just three or more crowns fused into one piece to replace a missing tooth. It is possible that doing a root canal through the brige will damage the bridge and the whole until may need to be replaced if that happens. But that's not common.


What is the root canal of a tooth?

Infection of the pulp inside your tooth by oral bacteria necessitates root canal therapy. This typically occurs when a cavity is neglected over an extended period of time. Additionally, it could happen if a traumatised tooth cracks or sustains other damage. In actuality, having a decaying tooth is probably more uncomfortable. The injured tooth can be removed, there is no need for further treatment, or a dental implant, bridge, or removable partial denture can be used to replace the missing tooth. Following a root canal, your tooth should be functionally and aesthetically restored with a new crown. Your restored tooth might last a lifetime if you practise appropriate dental and oral care. After this treatment, teeth may be sensitive for the first few days. My Island Dentist team can treat any dental issue, including, Tooth Coloured Fillings, Root Canal Therapy, Extractions, Crowns, Bridges, Dentures, Emergency Treatment etc.


What is in the root canal of the tooth?

Infection of the pulp inside your tooth by oral bacteria necessitates root canal therapy. This typically occurs when a cavity is neglected over an extended period of time. Additionally, it could happen if a traumatised tooth cracks or sustains other damage. In actuality, having a decaying tooth is probably more uncomfortable. The injured tooth can be removed, there is no need for further treatment, or a dental implant, bridge, or removable partial denture can be used to replace the missing tooth. Following a root canal, your tooth should be functionally and aesthetically restored with a new crown. Your restored tooth might last a lifetime if you practise appropriate dental and oral care. After this treatment, teeth may be sensitive for the first few days. My Island Dentist team can treat any dental issue, including, Tooth Coloured Fillings, Root Canal Therapy, Extractions, Crowns, Bridges, Dentures, Emergency Treatment etc.


What is in the root canal of a tooth?

Infection of the pulp inside your tooth by oral bacteria necessitates root canal therapy. This typically occurs when a cavity is neglected over an extended period of time. Additionally, it could happen if a traumatised tooth cracks or sustains other damage. In actuality, having a decaying tooth is probably more uncomfortable. The injured tooth can be removed, there is no need for further treatment, or a dental implant, bridge, or removable partial denture can be used to replace the missing tooth. Following a root canal, your tooth should be functionally and aesthetically restored with a new crown. Your restored tooth might last a lifetime if you practise appropriate dental and oral care. After this treatment, teeth may be sensitive for the first few days. My Island Dentist team can treat any dental issue, including, Tooth Coloured Fillings, Root Canal Therapy, Extractions, Crowns, Bridges, Dentures, Emergency Treatment etc.


Is a root canal surgery?

It is a procedure used to save an abscessed tooth by removing the dental pulp (nerve), usually if the tooth is dead or has had the pulp exposed (due to cavities or fractures). After the pulp is removed and any infection has been resolved, the hollow area left behind after the nerve is removed is filled in with a rubber-like material called gutta-percha. Before the days of root canals, most damaged teeth needed to be replaced.AnswerWhen a cavity has reached the living part of the tooth, the pulp where the nerve lies, the dentist proceeds to heal the tooth with a root canal in order to avoid a bacterial infection. Once the bacteria have penetrated the pulp, the tooth must be devitalized or have its living tissue removed. The external tooth is still held fast by the root, but in most cases needs to have a cap or splint fitted.


Causes of a root canal?

A root canal procedure is done as a result of bacteria reaching into the root canal of a tooth. The remenents of the nerve and pulp is taken out and sealed. A crown is then put over the ground down tooth.


Will a root of a tooth dissolve on its own?

No, a root of a tooth will not dissolve on its own. If there is a problem with a tooth root, it may require treatment such as a root canal to address the issue. It is important to see a dentist for proper evaluation and treatment.


Does Nova Dental insurance provide good coverage?

NO! THEY PAYED VERY LITTLE WHEN MY HUSBAND NEEDED A ROOT CANAL AND WOULD NOT PAY ANYTHING FOR THE CAP THAT NEEDED TO BE PLACED OVER THE TOOTH!