I have a medium size, soft yet firm lump behind my upper left second molar. It s directly on the site where I had a wisdom tooth removed - a bit away from my molar itself. I can only relate it s density/shape to a water blister , but a bit more firm. It s only slightly upraised. It s painful to the touch, but no more than a 2-3 pain level. It s worst when I smile or chew and move my cheek against it. I have no history of abscesses or even cavities on my upper teeth , though I have had a root canal on my lower left second molar. And I should probably point out that my wisdom teeth were supposedly wrapped tightly around something and needed to be shattered, or so they say, and they damaged nerve in the area and left tons of shards in my gums afterwards, so I ve had a lot of problems since such as TMJ , but never anything like this. There s also no pain in any of my teeth, or the gums themselves, only that region. I m just wondering if this is something worth making a dental appointment for or if this is something that will go away on it s own. I m only hesitant because the dentists in my area that are within my coverage haven t had the best reputation. Thank you for your help!