<s>[INST] I have a painful lump at the back of my tooth where the wisdom tooth should be.  I recently has x rays and he said I wouldnt get wisdom teeth although there was one in my jaw. The pain is a dull aChe and it hurts to open my jaw and swollow down one side... [/INST] Hello and welcome to Chat Doctor forum, I would like to inform you that the painful lump can be from cheek biting or from an impacted wisdom tooth. But as you mentioned here, X-rays have already been taken, I assume that wisdom tooth is not present in your case, but if it is then its probably impacted and need to be removed by a specialist. I will advise you to take a second opinion from an oral and maxillofacial surgeon. Kindly avoid chewing from that side and perform warm saline rinses at least 3-4 times/day, this will lower down the swelling. Please write back to us if you need a detailed explanation or have nay more queries. don't forget to attach your tooth x-ray with your query.I wish you good health take care. </s>