What causes swelling behind the last tooth?

Hello,

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I think you are having infection in the area and it got swollen. It may be due to food impaction or decay in the area. You should ask your dentist to either do a small surgery to remove the inflamed flap or just some cleaning of the area might be enough. Take some antibiotic and anti-inflammatory if required.

Hello,

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Mostly it has nothing to do with lower wisdom teeth. Did you extract the upper wisdom tooth on that side? Sometimes, upper wisdom teeth start growing down because of loss of lower tooth and starts hitting gums may cause swelling. I cannot see the upper jaw in the picture (attachment removed to protect patient identity). Also, we need to rule whether you have any part of the wisdom tooth still remaining. A good x-ray of the area would give a better diagnosis. Still, a mouthwash like you said might be enough to heal the inflammation.

Hi,

Welcome back to icliniq.com.

Then it is nothing to be worried about. By the look it appears to be not infected. It is just a thick gum formed over the area which can be sometimes asymmetric to other side. You do not have to be worried. Use mouthwash as required. Fibrous growth in that region is common. If it is painful, then take an anti-inflammatory. Else do not bother, a mouthwash is enough.