<s>[INST] Hi I went to my dentist on Monday (today is weds) for roor canal treatment. He filled three roots and put a temp filling in. The injections were a little painful and felt quite deep. My face is still swollen on one side like a hamster cheek and is tender. I have taken two paracetomol and 1 ibuprofen, should I be worried and will this swelling go down? If it is blood filling the area will this dissipate or cause a sever blood clot? Thankyou [/INST] Hi. Welcome to Chat Doctor . I have gone through your query and can understand your concerns. As per your complaint it seems that swelling over the face can be due to anesthesia injection, in case if the anesthesia injection is injected deep and that too for the upper back teeth and if the needle is penetrated deep it can enter the mesh of veins known as Venous plexus and there can be hematoma formation, and it can lead to swelling. Other cause can be due to dental abscess if the swelling was present before injection also. In case if it is due to hematoma formation it can take a few days to resolve and for this you do not need any medications and can do alternate warm and cool compresses. In case if it is due to abscess, the filling needs to be removed, tooth needs to be cleaned again and pus needs to be Chat Doctor. . You should consult your treating dentist and get evaluated and a thorough clinical evaluation and x-ray can help in diagnosis and treatment can be planned accordingly. Hope this information helps. Thanks and regards. </s>