hi For about 2 days now, i have a small marble sized lump beneath the left side of my chin , like where my teeth end basically, its beneath that. When i directly touch it, it can move a little. It isn t painful but the first day it felt as though i very slightly pulled a muscle there. (I have also had a cold sore right at the back of my mouth for the past 3 days, if there is any connection) Is it just an enlarged salivary gland?
Hi...it is extremely rare for salivary gland to get such noticeable swelling in a time frame of 2 or 3 days. More commonly it can be enlarged SUB MENTAL/ SUBMANDIBULAR group of lymph nodes, which are found at the, location as you have described in your case. The incidental swelling of lymph node is common in cold sore or any other oral infection. Keep a good oral hygiene with twice a day gargle with Chlorhexidine mouthwash, it should resolve within a day or two.  Alternatively you can also take amoxicillin antibiotics- 500 mg twice a day for 3 days.