What causes painful mass in between the cheek and jawbone post Lidocaine injection?
Patient: 1 week after having a lidocaine injection for cavity fill I have a yellow/purple bruise on 3/4 of my cheek with a very hard painful mass between my cheek and jawbone. I was given ammoxocillin last week after the procedure because my face became swollen and bruised immediately.  Should I be alarmed do I need to see a different dentist? Doctor: Hi..Welcome to HEALTHCARE MAGIC..I have gone through your query and can understand your concerns..As per your complain it seems that the anaesthesia injection needle have been penetrated too deep into the soft tissues and it has reached the venous plexus located deep in the upper back region and it has caused Hematoma formation that is leading to bruising and swelling..I would suggest you to consult an Oral Physician and get evaluated and he can do a thorough clinical evaluation and advise you investigations like x Ray to rule out the exact cause of swelling..As Hematoma is a self limiting condition, it will resolve gradually but can take a longer time to resolve..You can do alternate warm and cool compresses over the swelling atleast 3 to 4 times a day..Take anti-inflammatory painkillers like Ibuprofen..Hope this information helps..Thanks and regards.Dr.Honey Nandwani Arora.