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That would be a periapical abscess. The tooth it is associated with is dead, you should have a root canal or extraction a.s.a.p. Waiting too long will allow the recurrent infection to break down the bone supporting the tooth and the long term prognosis of a root canal will be diminished. Having a long standing recurrent infection can also cause numerous other systemic problems and risk blood sepsis if the infection is released into the blood stream. Go to your Dentist, get an X-ray.

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โˆ™ 2012-05-24 06:53:28
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Q: What are the causes of a lump on the gum that sometimes lets out pus?
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If you have a lump in your gum after you have had your wisdom teeth removed, it could just be swelling. If the lump does not go away, you should seek advice of your dentist.

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Is it normal to have a small hard lump on the gum after a tooth is removed?

What causes this depends on how long it is since the tooth was removed. Sometimes the dentist leaves behind a small piece of the tooth enamel. This will slowly work its way out, and will be felt as a lump under the surface of the gum. It will eventually come out completely (usually within 3 or 4 months) and this is usually pretty much painless. Another possibility is scar tissue. But if the tooth has been gone more than 4 months, have a check up.

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