Impacted Wisdom Tooth
A wisdom tooth can stay trapped in gum or bone and may cause gum pain, swelling, bad breath, or a bad taste.
[1][2]The short answer
An impacted wisdom tooth is one that remains partly or completely trapped because gum, bone, or another tooth blocks its route.
[1][2]
What the change looks like

What are the signs of an impacted wisdom tooth?
An impacted wisdom tooth may cause no symptoms. When it does cause trouble, a person may notice pain at the back of the mouth, swelling or tenderness around the gum, difficulty opening the mouth, bad taste or breath, or pressure near nearby teeth.
[1][2]| Clinical question | What this can mean |
|---|---|
| What is assessed? | An impacted wisdom tooth may cause no symptoms. When it does cause trouble, a person may notice pain at the back of the mouth, swelling or tenderness around the gum, difficulty opening the mouth, bad taste or breath, or pressure near nearby teeth.[1][2] |
| What guides the next step? | Bad breath, a bad taste, swollen gums, jaw pain, difficulty opening the mouth, or a visible gap can occur when the tooth is partly erupted.[1][2] |
Why does a wisdom tooth become impacted?
Is the wisdom tooth partly or fully impacted?
A wisdom tooth may be partly visible, fully covered by gum, or held within bone. The important distinction is whether it is cleanable and symptom-free, or whether its position is linked with pain, infection or damage around it.
[1][2]| Clinical question | What this can mean |
|---|---|
| What is assessed? | A wisdom tooth may be partly visible, fully covered by gum, or held within bone. The important distinction is whether it is cleanable and symptom-free, or whether its position is linked with pain, infection or damage around it.[1][2] |
| What guides the next step? | A tooth can be partly erupted, completely covered by gum, or held in bone; food and plaque can collect around a partly erupted tooth.[1][2] |
Which wisdom-tooth problems need attention?
How is an impacted wisdom tooth found?
When is an impacted wisdom tooth removed?
A symptom-free tooth may be monitored when examination supports that approach. A tooth causing repeated symptoms or local problems may need removal. The choice depends on the clinical and imaging findings.
[1][2]| Clinical question | What this can mean |
|---|---|
| What is assessed? | A symptom-free tooth may be monitored when examination supports that approach. A tooth causing repeated symptoms or local problems may need removal. The choice depends on the clinical and imaging findings.[1][2] |
| What guides the next step? | Removal is the usual treatment for an impacted wisdom tooth, while a tooth causing no problems may need no treatment.[1][2] |
